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

AS3257 · GTT-BACKBONE

GTT Communications Inc.

AS3257 belongs to GTT Communications Inc. and is a Tier-1 transit provider, established in the United States in 2002. The system announces an impressive 8.5 million IPv4 addresses, including a /14, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in the United Kingdom and Germany, and smaller footprints in 71 additional countries. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #4 by Reach — Top 100 by customer cone size
  • #68 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
April 18, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 348 / 833
IPv6 Prefixes (raw / aggregated)
66 / 51
IPv4 Addresses
8 538 624
Largest IPv4 Prefix
/14 (262 144 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (5 914 560 IPs), 🇬🇧 United Kingdom (3 732 784 IPs), 🇩🇪 Germany (1 045 536 IPs) and 71 more
Prefix Changed
April 19, 2026

Reputation

Reputation
Good — 148 flagged IPs out of 8 538 624 total (0.00%)

Connectivity Summary

Peers
38 networks exchanging traffic without transit
Downstream Customers
1 792 downstreams buying transit
Unclassified
53 unclassified BGP neighbors
Degree
1 883 unique BGP neighbors
Reach
62 198 networks in customer cone

Prefix Lists

IPv4 Prefixes (1 348 total)

  • 82.108.0.0/14 (262 144 addresses (/14 prefix))
  • 87.84.0.0/14 (262 144 addresses (/14 prefix))
  • 217.204.0.0/14 (262 144 addresses (/14 prefix))
  • 68.164.0.0/14 (262 144 addresses (/14 prefix))
  • 67.100.0.0/14 (262 144 addresses (/14 prefix))
  • 66.166.0.0/15 (131 072 addresses (/15 prefix))
  • 72.244.0.0/15 (131 072 addresses (/15 prefix))
  • 66.92.0.0/15 (131 072 addresses (/15 prefix))
  • 212.134.0.0/15 (131 072 addresses (/15 prefix))
  • 87.82.0.0/15 (131 072 addresses (/15 prefix))
  • 154.14.0.0/15 (131 072 addresses (/15 prefix))
  • 65.84.0.0/15 (131 072 addresses (/15 prefix))
  • 74.0.0.0/15 (131 072 addresses (/15 prefix))
  • 64.248.0.0/15 (131 072 addresses (/15 prefix))
  • 64.204.0.0/15 (131 072 addresses (/15 prefix))
  • 206.135.0.0/16 (65 536 addresses (/16 prefix))
  • 66.95.0.0/16 (65 536 addresses (/16 prefix))
  • 212.168.0.0/16 (65 536 addresses (/16 prefix))
  • 64.105.0.0/16 (65 536 addresses (/16 prefix))
  • 205.179.0.0/16 (65 536 addresses (/16 prefix))
  • 64.144.0.0/16 (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))
  • 134.222.0.0/16 (65 536 addresses (/16 prefix))
  • 135.196.0.0/16 (65 536 addresses (/16 prefix))
  • 195.172.0.0/16 (65 536 addresses (/16 prefix))
  • 195.143.0.0/16 (65 536 addresses (/16 prefix))
  • 65.86.0.0/16 (65 536 addresses (/16 prefix))
  • 66.80.0.0/16 (65 536 addresses (/16 prefix))
  • 195.86.0.0/16 (65 536 addresses (/16 prefix))
  • 195.81.0.0/16 (65 536 addresses (/16 prefix))
  • 86.53.0.0/16 (65 536 addresses (/16 prefix))
  • 85.189.0.0/16 (65 536 addresses (/16 prefix))
  • 149.235.0.0/16 (65 536 addresses (/16 prefix))
  • 64.81.0.0/16 (65 536 addresses (/16 prefix))
  • 216.132.0.0/16 (65 536 addresses (/16 prefix))
  • 84.37.0.0/16 (65 536 addresses (/16 prefix))
  • 66.134.0.0/16 (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))
  • 155.229.0.0/16 (65 536 addresses (/16 prefix))
  • 208.41.0.0/16 (65 536 addresses (/16 prefix))
  • 81.188.0.0/16 (65 536 addresses (/16 prefix))
  • 195.40.0.0/16 (65 536 addresses (/16 prefix))
  • 66.200.0.0/16 (65 536 addresses (/16 prefix))
  • 209.101.0.0/16 (65 536 addresses (/16 prefix))
  • 195.21.0.0/16 (65 536 addresses (/16 prefix))
  • 194.231.0.0/16 (65 536 addresses (/16 prefix))
  • 69.3.0.0/16 (65 536 addresses (/16 prefix))
  • 69.33.0.0/16 (65 536 addresses (/16 prefix))
  • and 783 more

IPv6 Prefixes (66 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
  • 2a00:8d00::/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
  • 2001:1478::/32
  • 2a06:9f47::/32
  • 2001:590::/32
  • 2a02:9e8::/32
  • 2a02:d28::/32
  • 2a02:6280::/32
  • 2a0d:d901::/32
  • 2604:cf80::/32
  • 2001:4890::/32
  • 2a04:a3c7::/32
  • 2405:5e00::/32
  • 2a0a:6041::/32
  • 2400:f780::/32
  • 2a06:2b81::/32
  • 2602:ffb7:590::/46
  • 2a06:1180:12bb::/48
  • 2a0a:2d04:9825::/48
  • 2a05:a882:de10::/48
  • 2a0c:7881:98dd::/48
  • 2600:1407:1c::/48
  • 2a04:e00:2::/48
  • 2a0e:15c0:1213::/48
  • 2a0f:7d00:32ba::/48
  • 2a00:7580:16::/48
  • 2a00:4b00:171::/48
  • 2620:135:7003::/48
  • 2620:131:2024::/48
  • and 1 more