$ query “AS3257” --type=asn → 1 result(s)

AS3257 · GTT-BACKBONE

GTT Communications Inc.

AS3257 is owned by GTT Communications Inc. and is a Tier-1 transit provider, registered in the United States since 2002. The system announces an impressive 8.6 million IPv4 addresses, including a /14, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in the United Kingdom and Germany, and smaller footprints in 72 additional countries. This AS has recently updated its prefix announcements.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #4 by Reach — Top 100 by customer cone size
  • #66 by Degree — Top 100 by unique BGP neighbor count
  • #3 in United States — Top 10 by reach within country

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Tier-1 Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
September 20, 2002
Last Changed
March 04, 2026
Last Seen
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 356 / 847
IPv6 Prefixes (raw / aggregated)
69 / 53
IPv4 Addresses
8 639 488
Largest IPv4 Prefix
/14 (262 144 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (6 038 224 IPs), 🇬🇧 United Kingdom (3 724 432 IPs), 🇩🇪 Germany (1 069 936 IPs) and 72 more
Prefix Changed
June 23, 2026

Reputation

Reputation
Good — 21 flagged IPs out of 8 639 488 total (0.00%)

Connectivity Summary

Peers
37 networks exchanging traffic without transit
Downstream Customers
1 800 downstreams buying transit
Unclassified
55 unclassified BGP neighbors
Degree
1 892 unique BGP neighbors
Reach
65 405 networks in customer cone

Prefix Lists

IPv4 Prefixes (1 356 total)

  • 67.100.0.0/14 (262 144 addresses (/14 prefix))
  • 82.108.0.0/14 (262 144 addresses (/14 prefix))
  • 217.204.0.0/14 (262 144 addresses (/14 prefix))
  • 87.84.0.0/14 (262 144 addresses (/14 prefix))
  • 68.164.0.0/14 (262 144 addresses (/14 prefix))
  • 64.248.0.0/15 (131 072 addresses (/15 prefix))
  • 66.92.0.0/15 (131 072 addresses (/15 prefix))
  • 66.166.0.0/15 (131 072 addresses (/15 prefix))
  • 154.14.0.0/15 (131 072 addresses (/15 prefix))
  • 64.204.0.0/15 (131 072 addresses (/15 prefix))
  • 72.244.0.0/15 (131 072 addresses (/15 prefix))
  • 74.0.0.0/15 (131 072 addresses (/15 prefix))
  • 212.134.0.0/15 (131 072 addresses (/15 prefix))
  • 65.84.0.0/15 (131 072 addresses (/15 prefix))
  • 87.82.0.0/15 (131 072 addresses (/15 prefix))
  • 69.3.0.0/16 (65 536 addresses (/16 prefix))
  • 86.53.0.0/16 (65 536 addresses (/16 prefix))
  • 74.2.0.0/16 (65 536 addresses (/16 prefix))
  • 207.145.0.0/16 (65 536 addresses (/16 prefix))
  • 207.168.0.0/16 (65 536 addresses (/16 prefix))
  • 161.232.0.0/16 (65 536 addresses (/16 prefix))
  • 195.81.0.0/16 (65 536 addresses (/16 prefix))
  • 155.229.0.0/16 (65 536 addresses (/16 prefix))
  • 206.135.0.0/16 (65 536 addresses (/16 prefix))
  • 195.86.0.0/16 (65 536 addresses (/16 prefix))
  • 65.86.0.0/16 (65 536 addresses (/16 prefix))
  • 208.41.0.0/16 (65 536 addresses (/16 prefix))
  • 205.179.0.0/16 (65 536 addresses (/16 prefix))
  • 212.168.0.0/16 (65 536 addresses (/16 prefix))
  • 212.212.0.0/16 (65 536 addresses (/16 prefix))
  • 212.222.0.0/16 (65 536 addresses (/16 prefix))
  • 64.144.0.0/16 (65 536 addresses (/16 prefix))
  • 81.188.0.0/16 (65 536 addresses (/16 prefix))
  • 194.231.0.0/16 (65 536 addresses (/16 prefix))
  • 216.132.0.0/16 (65 536 addresses (/16 prefix))
  • 195.143.0.0/16 (65 536 addresses (/16 prefix))
  • 64.105.0.0/16 (65 536 addresses (/16 prefix))
  • 134.222.0.0/16 (65 536 addresses (/16 prefix))
  • 64.81.0.0/16 (65 536 addresses (/16 prefix))
  • 66.80.0.0/16 (65 536 addresses (/16 prefix))
  • 149.235.0.0/16 (65 536 addresses (/16 prefix))
  • 64.51.0.0/16 (65 536 addresses (/16 prefix))
  • 66.95.0.0/16 (65 536 addresses (/16 prefix))
  • 209.101.0.0/16 (65 536 addresses (/16 prefix))
  • 66.134.0.0/16 (65 536 addresses (/16 prefix))
  • 195.172.0.0/16 (65 536 addresses (/16 prefix))
  • 84.37.0.0/16 (65 536 addresses (/16 prefix))
  • 85.189.0.0/16 (65 536 addresses (/16 prefix))
  • 195.40.0.0/16 (65 536 addresses (/16 prefix))
  • 135.196.0.0/16 (65 536 addresses (/16 prefix))

IPv6 Prefixes (69 total)

  • 2001:668::/29
  • 2a14:5200::/29
  • 2a14:4b00::/29
  • 2a14:4340::/29
  • 2a13:fc00::/29
  • 2a0a:1f40::/29
  • 2a05:18c0::/29
  • 2a04:6640::/29
  • 2a04:1120::/30
  • 2a0c:8640::/30
  • 2a0f:b242::/31
  • 2a00:bb40::/32
  • 2001:590::/32
  • 2605:9e00::/32
  • 2605:d480::/32
  • 2606:6200::/32
  • 2607:f588::/32
  • 2610:38::/32
  • 2001:680::/32
  • 2001:6f8::/32
  • 2a00:16c8::/32
  • 2a00:1750::/32
  • 2a00:43c0::/32
  • 2001:aa0::/32
  • 2a0f:b247::/32
  • 2a00:8d00::/32
  • 2a0a:6041::/32
  • 2a02:9e8::/32
  • 2a02:d28::/32
  • 2a02:6280::/32
  • 2001:1478::/32
  • 2400:f780::/32
  • 2604:cf80::/32
  • 2a04:a3c7::/32
  • 2405:5e00::/32
  • 2a0d:d901::/32
  • 2001:4890::/32
  • 2a06:2b81::/32
  • 2a06:9f47::/32
  • 2602:ffb7:590::/46
  • 2600:1407:1c::/48
  • 2a0a:2d04:9825::/48
  • 2a0c:7881:98dd::/48
  • 2a06:1180:12bb::/48
  • 2a05:a882:de10::/48
  • 2a0e:15c0:1213::/48
  • 2a0f:7d00:32ba::/48
  • 2a04:e00:2::/48
  • 2a00:7580:16::/48
  • 2a00:4b00:171::/48