178:
22:
104:
145:
On
October 5, Facebook's engineering team posted a blog post explaining the cause of the outage. During maintenance, a command was run to assess the global backbone capacity, and that command accidentally disconnected all of Facebook's data centers. While Facebook's DNS servers ran on a separate
95:(BGP) routing was restored for the affected prefixes at about 21:50, and DNS services began to be available again at 22:05 UTC, with application-layer services gradually restored to Facebook, Instagram, and WhatsApp over the following hour, with service generally restored for users by 22:50.
137:
reported that at 15:39 UTC, Facebook made a significant number of BGP updates, including the withdrawal of routes to the IP prefixes, which included all of their authoritative nameservers. This made
Facebook's DNS servers unreachable from the Internet. By 15:50 UTC, Facebook's
1257:"Someone on the Facebook recovery effort has explained that a routine BGP update went wrong, which in turn locked out those with remote access who could reverse the mistake. Those who do have physical access do not have authorization on the servers. Catch-22"
130:
Facebook and related domain names, and reach services. Effects were visible globally; for example, Swiss
Internet service provider Init7 recorded a massive drop in internet traffic to the Facebook servers after the change in the Border Gateway Protocol.
142:
had expired from the caches in all major public resolvers. A little before 21:00 UTC, Facebook resumed announcing BGP updates, with
Facebook's domain name becoming resolvable again at 21:05 UTC.
1559:
1592:
1461:
898:
146:
network, they were designed to withdraw their BGP routes if they could not connect to
Facebook's data centers, making it impossible for the rest of the internet to connect to Facebook.
1428:
1398:
1334:
963:
1528:
565:
The outage cut off
Facebook's internal communications, preventing employees from sending or receiving external emails, accessing the corporate directory, and authenticating to some
454:
1201:
791:
668:
Users on both
Twitter and Telegram reported a slowdown in response times, believed to be caused by people normally on Facebook services switching to those services.
610:
reported that the outage was the worst experienced by
Facebook since 2008. During the day of the outage, shares in the company dropped by nearly 5% and Facebook CEO
1064:
647:, wrote an apology after the downtime had extended to several hours, saying, "Teams are working as fast as possible to debug and restore as fast as possible."
1301:
753:
1367:
830:
2907:
204:
1147:
1551:
1031:
1582:
2997:
504:
1451:
890:
868:
718:
2932:
1420:
1390:
1000:
439:
1324:
953:
1520:
1781:
1195:
1121:
2952:
422:
1816:
1645:
1264:
781:
587:, a security researcher, said that those with authorization to reverse the mistake could not use remote access due to the issue.
552:
1494:
1233:
3015:
1172:
2917:
2563:
583:, which monitors network outages, recorded over 10 million problem reports – the largest number for an incident to date.
524:
1821:
672:
584:
127:
930:
2959:
1719:
472:
1739:
1054:
653:, a U.S. representative from New York, tweeted about the outage, asking people to share "evidence-based" stories on
579:
reported that employees were unable to access buildings and conference rooms with their security badges. The site
60:, became globally unavailable for a period of six to seven hours. The outage also prevented anyone trying to use "
3078:
1552:"AOC mocks Facebook outage by asking people to share positive 'evidence-based' stories on rival platform Twitter"
1291:
745:
1359:
814:
153:, data center and reset them. By about 22:45 UTC, Facebook and related services were generally available again.
2947:
417:
1094:
3093:
1915:
1638:
1143:
107:
1023:
2822:
2738:
2508:
2871:
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3037:
2276:
545:
1759:
2937:
2366:
2234:
1729:
1694:
1684:
459:
444:
232:
1521:"Twitter users suggest site is slowing down as it takes pressure from Facebook and Instagram outage"
2989:
2973:
1826:
1806:
858:
650:
488:
272:
992:
710:
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1631:
684:
496:
480:
150:
115:
92:
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432:
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392:
76:
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2793:
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2487:
1990:
1766:
1724:
689:
538:
410:
192:
1117:
25:
Traffic volume for
Facebook services on October 4, 2021 with a drop during the global outage
21:
2902:
2876:
2798:
2763:
2676:
2354:
1947:
1905:
1734:
1260:
958:
279:
247:
197:
61:
41:
1421:"Facebook Outage Causes Share Drop, Zuckerberg Loses US$ 5.9B Net Worth – October 5, 2021"
8:
2892:
2815:
2788:
2670:
2408:
2222:
187:
83:, resulting in disruptions on these sites' servers. The outage was caused by the loss of
80:
2942:
2829:
2027:
1744:
863:
616:
575:
449:
123:
88:
954:"Is Twitter down?: Users report outage after Facebook, WhatsApp and Instagram go down"
3088:
2575:
2533:
2144:
1754:
822:
591:
119:
1484:
1325:"Gmail, TikTok and Snapchat Users Complain Apps Slowing Down During Facebook Outage"
64:" from accessing third-party sites. It lasted for 7 hours and 11 minutes.
2773:
2713:
2650:
2527:
2438:
2271:
2070:
1937:
1771:
1699:
628:
316:
1452:"Facebook's massive outage costs the company an estimated $ 60 million in revenue"
3052:
3042:
2846:
2728:
2645:
2502:
2432:
2396:
2291:
2286:
2216:
2204:
2170:
2124:
2119:
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2076:
2064:
2005:
1963:
1932:
1879:
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1689:
1489:
1329:
1256:
1225:
644:
611:
570:
356:
351:
323:
242:
237:
675:
with that of the outage, although those two events are unrelated to each other.
665:
also posted tweets on their official
Twitter accounts commenting on the outage.
3047:
3031:
2748:
2688:
2682:
2587:
2453:
2384:
2301:
2261:
2139:
2129:
2022:
1910:
1867:
1776:
1654:
1164:
284:
169:
149:
Facebook gradually returned after a team got access to server computers at the
57:
34:
1617:
3072:
2723:
2468:
2414:
2210:
2010:
1978:
1895:
1788:
826:
782:"Facebook is down, along with Instagram, WhatsApp, Messenger, and Oculus VR"
2851:
2778:
2665:
2634:
2630:
2624:
2591:
2581:
2444:
2372:
2348:
2306:
2296:
2134:
2086:
1900:
1872:
1862:
1852:
1197:
Facebook, Instagram appear to partly reconnect after nearly six-hour outage
1059:
925:
920:
746:"Locked out and totally down: Facebook is scrambling to fix massive outage"
632:
614:'s wealth fell by more than $ 6 billion. According to a report produced by
580:
374:
311:
301:
103:
2912:
2768:
2718:
2660:
2655:
2640:
2569:
2420:
2378:
2311:
2281:
2251:
2175:
2000:
1842:
566:
296:
139:
2866:
2861:
2620:
2614:
2608:
2426:
2402:
2390:
2228:
1968:
1847:
1587:
1296:
134:
84:
1292:"Google's 8.8.8.8 DNS service slows down amid massive Facebook outage"
2266:
2032:
1995:
1983:
1922:
1798:
786:
658:
267:
53:
45:
1087:"Insta und WhatsApp down – so stark schrumpfte der Internet-Traffic"
635:" program, affecting communication, business and humanitarian work.
2149:
1942:
1709:
1679:
1671:
1583:"Facebook whistleblower Frances Haugen testifies before the Senate"
1086:
603:
594:
service also slowed down as a result of the outage, while users of
328:
220:
49:
37:
2783:
2758:
2154:
2037:
1927:
1857:
1623:
1276:
654:
306:
291:
72:
68:
996:
714:
662:
621:
599:
624:, Facebook lost at least $ 60 million in advertising revenue.
2017:
1973:
891:"Millions Flock to Signal and Telegram After Facebook Outage"
595:
126:(DNS) servers were hosted, making it impossible for users to
1485:"Small businesses to aid: How Facebook outage upended lives"
2743:
1811:
1456:
1391:"Zuckerberg Loses $ 6 Billion in Hours as Facebook Plunges"
815:"Why Facebook, Instagram, and WhatsApp All Went Down Today"
607:
2685:(VP of Global Communications, Marketing and Public Policy)
1118:"Understanding How Facebook Disappeared from the Internet"
30:
1483:
Schapiro, Avi Asher; Teixeira, Fabio (October 5, 2021).
91:(DNS) servers, which were all self-hosted at the time.
859:"Facebook and all of its apps go down simultaneously"
1165:"Facebook, Whatsapp and Instagram back after outage"
1109:
657:, making fun of Facebook's reputation for spreading
1360:"Facebook is suffering its worst outage since 2008"
1136:
1024:"Facebook coming back online after lengthy outage"
671:Some media outlets highlighted the coincidence of
1194:Patnaik, Subrat; Mathews, Eva (October 4, 2021),
1116:Strickx, Tom; Martinho, Celso (October 4, 2021).
3070:
2998:Federal Trade Commission v. Meta Platforms, Inc.
1482:
1226:"Facebook, Whatsapp and Instagram suffer outage"
857:Isaac, Mike; Frenkel, Sheera (October 4, 2021).
1115:
1053:Duffy, Clare; Lyngaas, Sean (October 4, 2021).
627:The outage had a major impact on people in the
16:Outage affecting all Facebook operated services
1193:
1639:
1549:
1354:
1352:
546:
114:Security experts identified the problem as a
1052:
921:"Discord down? Current problems and outages"
856:
110:returning "SERVFAIL" status for Facebook.com
1646:
1632:
1349:
553:
539:
2691:(Product Manager of Civic Integrity Team)
1618:Why Did Facebook Go Down? – Computerphile
1580:
1388:
1144:"More details about the October 4 outage"
67:During the outage, many users flocked to
1159:
1157:
102:
20:
1514:
1512:
1187:
1055:"Facebook, Instagram, WhatsApp go down"
740:
738:
736:
711:"Facebook's historic outage, explained"
3071:
1518:
1322:
1289:
1254:
1220:
1218:
990:
779:
708:
455:WhatsApp security and privacy features
164:This article is part of a series about
1627:
1595:from the original on October 10, 2021
1581:Siberling, Amanda (October 5, 2021).
1550:O'Connell, Oliver (October 4, 2021).
1154:
1150:from the original on October 5, 2021.
951:
901:from the original on October 16, 2021
852:
850:
848:
643:Facebook's chief technology officer,
2617:(VP, General Counsel, and Secretary)
2536:(Board of Trustees Chair, 2020–2021)
1574:
1562:from the original on October 4, 2021
1531:from the original on October 4, 2021
1509:
1497:from the original on October 6, 2021
1464:from the original on October 5, 2021
1431:from the original on October 5, 2021
1401:from the original on October 5, 2021
1389:Carpenter, Scott (October 4, 2021).
1370:from the original on October 4, 2021
1337:from the original on October 4, 2021
1304:from the original on October 4, 2021
1267:from the original on October 5, 2021
1236:from the original on October 4, 2021
1204:from the original on October 5, 2021
1175:from the original on October 4, 2021
1124:from the original on October 4, 2021
1097:from the original on October 4, 2021
1067:from the original on October 4, 2021
1034:from the original on October 4, 2021
1003:from the original on October 4, 2021
966:from the original on October 4, 2021
933:from the original on October 4, 2021
871:from the original on October 4, 2021
833:from the original on October 5, 2021
794:from the original on October 4, 2021
775:
773:
771:
756:from the original on October 4, 2021
733:
721:from the original on January 4, 2022
1215:
1021:
812:
780:Lawler, Richard (October 4, 2021).
13:
1653:
1519:Massie, Graeme (October 4, 2021).
1323:Massie, Graeme (October 4, 2021).
1255:Gibson, Steve (October 4, 2021).
952:Dewar, Caitlyn (October 4, 2021).
845:
14:
3105:
1611:
768:
2933:Cambridge Analytica data scandal
1449:
993:"Facebook suffers global outage"
991:Madory, Doug (October 4, 2021).
709:Madory, Doug (October 5, 2021).
440:Cambridge Analytica data scandal
176:
2578:(head of Global Business Group)
1543:
1476:
1443:
1413:
1382:
1316:
1290:Schoon, Ben (October 4, 2021).
1283:
1248:
1079:
1046:
1015:
984:
1817:List of most-followed accounts
978:
945:
913:
883:
806:
702:
659:factually questionable content
1:
2231:(President of Global Affairs)
695:
122:prefixes in which Facebook's
29:On October 4, 2021, at 15:39
3016:Most-followed Facebook pages
631:, who depend on Facebook's "
606:also experienced slowdowns.
346:Executives and board members
7:
3043:Aquila Internet relay drone
2823:The Accidental Billionaires
1822:List of most-liked pictures
678:
638:
10:
3110:
3038:Chan Zuckerberg Initiative
673:Frances Haugen's testimony
3034:(wife of Mark Zuckerberg)
3024:
3008:
2885:
2839:
2807:
2706:
2601:
2556:
2547:
2530:(Board Member, 2020–2021)
2518:
2478:
2462:Pamela San Martin (2022–)
2367:Afia Asantewaa Asare-Kyei
2335:
2324:
2244:
2197:
2188:
2163:
2112:
2105:
2057:
2050:
1956:
1888:
1835:
1797:
1782:list of original programs
1670:
1661:
460:WhatsApp snooping scandal
156:
98:
2990:Facebook, Inc. v. Duguid
2974:Fraley v. Facebook, Inc.
2493:Kristina Arriaga (2020–)
651:Alexandria Ocasio-Cortez
489:Fraley v. Facebook, Inc.
118:(BGP) withdrawal of the
2982:Force v. Facebook, Inc.
2966:Young v. Facebook, Inc.
2943:2021 company files leak
2857:Friending and following
2566:(Graph Search director)
2496:Cherine Chalaby (2020–)
685:Google services outages
497:Force v. Facebook, Inc.
481:Young v. Facebook, Inc.
450:2021 company files leak
151:Santa Clara, California
116:Border Gateway Protocol
93:Border Gateway Protocol
3079:2020s internet outages
2459:Khaled Mansour (2022–)
2361:Helle Thorning-Schmidt
2343:Catalina Botero Marino
111:
40:and its subsidiaries,
26:
2898:Timeline of Instagram
2794:Telecom Infra Project
2611:(Director of Product)
2465:Paolo Carozza (2022–)
2450:Nicolas Suzor (2020–)
2237:(Chief Legal Officer)
690:Criticism of Facebook
505:FTC v. Meta Platforms
387:Related organizations
213:Products and services
106:
24:
3058:2021 Facebook outage
2903:Timeline of WhatsApp
2877:Facebook like button
2764:Open Compute Project
2677:Chamath Palihapitiya
2673:(research scientist)
2499:Wanda Felton (2020–)
2355:Michael W. McConnell
62:Log in with Facebook
3094:October 2021 events
2893:History of Facebook
2816:The Facebook Effect
2679:(VP of User Growth)
2671:Andrei Alexandrescu
2584:(head of Instagram)
2572:(VP of social good)
2409:Sudhir Krishnaswamy
1427:. October 5, 2021.
1366:. October 4, 2021.
1232:. October 4, 2021.
1171:. October 4, 2021.
1146:. October 5, 2021.
897:. October 5, 2021.
752:. October 4, 2021.
108:Major DNS resolvers
2953:Content management
2872:Facebook diplomacy
2830:The Social Network
2363:, Co-Chair (2020–)
2357:, Co-Chair (2020–)
2351:, Co-Chair (2020–)
2345:, Co-Chair (2020–)
2207:(Chairman and CEO)
1745:Lookalike audience
1028:The New York Times
864:The New York Times
576:The New York Times
525:Facebook, Inc. IPO
423:Content management
124:Domain Name System
112:
89:Domain Name System
27:
3084:2021 in computing
3066:
3065:
2702:
2701:
2698:
2697:
2576:Nicola Mendelsohn
2543:
2542:
2534:Paul G. Haaga Jr.
2320:
2319:
2235:Jennifer Newstead
2184:
2183:
2145:Robert M. Kimmitt
2046:
2045:
1022:Frenkel, Sheera.
592:Google Public DNS
563:
562:
369:Notable employees
3101:
2938:2020 ad boycotts
2714:Apache Cassandra
2651:Randi Zuckerberg
2554:
2553:
2528:Pamela S. Karlan
2333:
2332:
2195:
2194:
2110:
2109:
2071:Dustin Moskovitz
2055:
2054:
1730:Instant Articles
1695:Bluetooth Beacon
1668:
1667:
1648:
1641:
1634:
1625:
1624:
1605:
1604:
1602:
1600:
1578:
1572:
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1507:
1506:
1504:
1502:
1480:
1474:
1473:
1471:
1469:
1447:
1441:
1440:
1438:
1436:
1425:Daily News Brief
1417:
1411:
1410:
1408:
1406:
1386:
1380:
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1375:
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1008:
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943:
942:
940:
938:
917:
911:
910:
908:
906:
887:
881:
880:
878:
876:
854:
843:
842:
840:
838:
813:Barrett, Brian.
810:
804:
803:
801:
799:
777:
766:
765:
763:
761:
742:
731:
730:
728:
726:
706:
629:developing world
555:
548:
541:
445:2020 ad boycotts
418:Privacy concerns
180:
179:
161:
160:
87:to the Facebook
3109:
3108:
3104:
3103:
3102:
3100:
3099:
3098:
3069:
3068:
3067:
3062:
3053:WaveGroup Sound
3020:
3004:
2881:
2847:Activity stream
2835:
2803:
2694:
2646:Charlie Cheever
2597:
2549:
2539:
2520:
2514:
2490:, Chair (2021–)
2480:
2474:
2433:Alan Rusbridger
2397:Tawakkol Karman
2327:
2316:
2292:Mike Schroepfer
2287:Sheryl Sandberg
2240:
2217:Andrew Bosworth
2205:Mark Zuckerberg
2190:
2180:
2171:Sheryl Sandberg
2159:
2125:Marc Andreessen
2120:Mark Zuckerberg
2101:
2097:Andrew McCollum
2077:Eduardo Saverin
2065:Mark Zuckerberg
2042:
1964:Atlas Solutions
1952:
1933:Meta Horizon OS
1884:
1880:Ray-Ban Stories
1831:
1793:
1663:
1657:
1652:
1614:
1609:
1608:
1598:
1596:
1579:
1575:
1565:
1563:
1556:The Independent
1548:
1544:
1534:
1532:
1525:The Independent
1517:
1510:
1500:
1498:
1490:Thomson Reuters
1481:
1477:
1467:
1465:
1450:Wong, Queenie.
1448:
1444:
1434:
1432:
1419:
1418:
1414:
1404:
1402:
1387:
1383:
1373:
1371:
1358:
1357:
1350:
1340:
1338:
1330:The Independent
1321:
1317:
1307:
1305:
1288:
1284:
1270:
1268:
1253:
1249:
1239:
1237:
1224:
1223:
1216:
1207:
1205:
1192:
1188:
1178:
1176:
1163:
1162:
1155:
1142:
1141:
1137:
1127:
1125:
1114:
1110:
1100:
1098:
1085:
1084:
1080:
1070:
1068:
1051:
1047:
1037:
1035:
1020:
1016:
1006:
1004:
989:
985:
979:
969:
967:
950:
946:
936:
934:
919:
918:
914:
904:
902:
889:
888:
884:
874:
872:
855:
846:
836:
834:
811:
807:
797:
795:
778:
769:
759:
757:
744:
743:
734:
724:
722:
707:
703:
698:
681:
645:Mike Schroepfer
641:
612:Mark Zuckerberg
559:
530:
529:
520:
512:
511:
475:
465:
464:
413:
398:
397:
393:Oversight Board
388:
380:
379:
370:
362:
361:
357:Sheryl Sandberg
352:Mark Zuckerberg
347:
334:
333:
324:Ray-Ban Stories
263:
255:
254:
223:
177:
159:
101:
17:
12:
11:
5:
3107:
3097:
3096:
3091:
3086:
3081:
3064:
3063:
3061:
3060:
3055:
3050:
3048:Willow Village
3045:
3040:
3035:
3032:Priscilla Chan
3028:
3026:
3022:
3021:
3019:
3018:
3012:
3010:
3006:
3005:
3003:
3002:
2994:
2986:
2978:
2970:
2962:
2957:
2956:
2955:
2950:
2945:
2940:
2935:
2925:
2920:
2915:
2910:
2905:
2900:
2895:
2889:
2887:
2883:
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2908:Acquisitions
2852:Social graph
2828:
2821:
2814:
2779:React Native
2666:Joe Lockhart
2635:Reality Labs
2631:John Carmack
2625:Reality Labs
2592:Reality Labs
2582:Adam Mosseri
2503:Kate O'Regan
2488:Stephen Neal
2445:John Samples
2373:Evelyn Aswad
2349:Jamal Greene
2307:Marne Levine
2297:David Wehner
2256:4%, formerly
2255:
2135:Drew Houston
2091:1%, formerly
2090:
2087:Chris Hughes
2081:5%, formerly
2080:
2067:(28% equity)
1938:Supernatural
1767:Safety Check
1725:Graph Search
1664:and services
1597:. Retrieved
1586:
1576:
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1363:
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1060:CNN Business
1058:
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1036:. Retrieved
1027:
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926:Downdetector
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649:
642:
626:
615:
589:
585:Steve Gibson
581:Downdetector
574:
564:
503:
495:
487:
479:
375:Adam Mosseri
317:Supernatural
227:
205:Acquisitions
148:
144:
133:
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28:
18:
2769:Phabricator
2719:Apache Hive
2707:Open source
2661:George Hotz
2656:Yishan Wong
2641:Matt Cohler
2570:Naomi Gleit
2509:Robert Post
2439:András Sajó
2421:Julie Owono
2379:Endy Bayuni
2312:Alex Stamos
2282:Bret Taylor
2277:Chris Kelly
2252:Sean Parker
2176:Peter Thiel
2001:Oculus Rift
1901:Free Basics
1735:Like button
1599:October 10,
1200:, Reuters,
633:Free Basics
567:Google Docs
297:Meta Portal
248:Like button
228:2021 outage
3073:Categories
2960:Litigation
2923:Censorship
2867:Fan-gating
2862:Reblogging
2808:Mass media
2621:Hugo Barra
2615:Ted Ullyot
2609:Blake Ross
2427:Emi Palmor
2403:Maina Kiai
2391:Nighat Dad
2229:Nick Clegg
1969:FriendFeed
1848:Meta Quest
1807:Hyperlapse
1588:TechCrunch
1566:October 4,
1535:October 4,
1501:October 6,
1468:October 5,
1435:October 5,
1405:October 5,
1374:October 4,
1341:October 5,
1308:October 5,
1297:9to5Google
1271:October 5,
1240:October 4,
1208:October 5,
1179:October 4,
1128:October 4,
1101:October 4,
1071:October 4,
1038:October 4,
1007:October 4,
970:October 4,
959:The Herald
937:October 4,
905:October 6,
875:October 4,
837:October 5,
798:October 4,
760:October 4,
725:October 7,
696:References
573:services.
473:Litigation
135:Cloudflare
120:IP address
3001:(ongoing)
2928:Criticism
2594:director)
2550:employees
2326:Oversight
2267:Gideon Yu
2223:Chris Cox
2189:Executive
2028:Slingshot
1996:Oculus Go
1984:HTC First
1948:Workplace
1923:Mapillary
1906:Messenger
1799:Instagram
1620:, YouTube
1395:Bloomberg
1091:watson.ch
827:1059-1028
787:The Verge
750:The Verge
508:(ongoing)
411:Criticism
280:Messenger
268:Instagram
193:Instagram
85:IP routes
54:Mapillary
46:Instagram
42:Messenger
3089:Facebook
2886:Business
2840:Concepts
2633:(CTO of
2481:Trustees
2479:Board of
2191:officers
2150:Hock Tan
2058:Founders
1943:WhatsApp
1836:Hardware
1755:Platform
1710:EdgeRank
1685:Features
1672:Facebook
1662:Products
1593:Archived
1560:Archived
1529:Archived
1495:Archived
1462:Archived
1429:Archived
1399:Archived
1368:Archived
1335:Archived
1302:Archived
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