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AS3949
AS3949 NTT America, Inc.
NTTA-3946 - NTT America, Inc. · registered in the United States
IPv4 addresses 11,516 32 prefixes · <0.001% of announced IPv4
Rank in United States #2,792 largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide #8,489 of 79,396 networks with IPv4
IPv6 1,208,907,372,870,555,465,154,560 addresses (smaller than a /48) 16 prefixes
IPv4 prefixes
All 32 prefixes, in address order.
23.27.212.0/23 23.27.227.0/24 23.27.229.0/24 45.149.225.0/24 45.149.226.0/24 62.73.186.0/24 80.96.148.0/23 80.174.216.0/21 81.93.189.64/29 83.231.161.8/29 91.123.68.0/23 103.13.83.144/28 103.13.83.160/29 136.0.49.0/24 136.0.62.0/24 136.0.69.0/24 142.111.167.0/24 142.111.169.0/24 166.88.42.0/23 166.88.103.0/24 171.22.145.0/24 185.243.129.0/24 193.28.144.0/24 193.28.148.0/24 193.39.136.0/24 202.68.66.76/30 202.68.68.0/26 202.68.75.80/28 202.68.79.128/25 205.132.16.0/22 205.132.20.0/22 207.71.84.0/22
IPv6 prefixes
All 16 prefixes.
2407:a800:3e11::/52 2407:a800:3e11:1000::/56 2407:a800:3e11:1100::/60 2407:a800:3e11:1110::/61 2407:a800:3e11:1118::/63 2407:a800:3e11:111b::/64 2407:a800:3e11:111c::/62 2407:a800:3e11:1120::/59 2407:a800:3e11:1140::/58 2407:a800:3e11:1180::/57 2407:a800:3e11:1200::/55 2407:a800:3e11:1400::/54 2407:a800:3e11:1800::/53 2407:a800:3e11:2000::/51 2407:a800:3e11:4000::/50 2407:a800:3e11:8000::/49
Other ASNs named NTT America, Inc.
10 other networks use the same organisation name; together with AS3949 they announce 4,855,970 IPv4 addresses.
ASN Name IPv4 addresses
AS2914 NTT-DATA-2914 - NTT America, Inc. US 4,832,292 AS11158 NETDEPON - NTT America, Inc. US 7,680 AS1225 NTTA-1225 - NTT America, Inc. US 1,280 AS275 NTTA-275 - NTT America, Inc. US 1,090 AS3938 NTTA-3936 - NTT America, Inc. US 1,024 AS97 NTTA-97 - NTT America, Inc. US 512 AS7019 NTTA-7019 - NTT America, Inc. US 288 AS93 NTTA-93 - NTT America, Inc. US 256 AS3939 NTTA-3936 - NTT America, Inc. US 32 AS262 VERIO - NTT America, Inc. US IPv6 only
Similar-sized networks in United States
ASN Name IPv4 addresses
AS46783 #2790 EL-US - EASY LINK LLC11,520 AS215728 #2791 CloudWebManage Kamatera Inc11,520 AS22006 #2793 PRONSS-PULKCO-AS - PRONSS11,272 AS40281 #2794 QWKNET - QWK.net Hosting, L.L.C.11,264 AS11767 #2795 QTS-MIA - Quality Technology Services, LLC11,264
IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources