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

AS3257 · GTT-BACKBONE

GTT Communications Inc.

AS3257 is operated by GTT Communications Inc. and serves as a Tier-1 transit provider, based 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 96 additional countries. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #2 by Reach — Top 100 by customer cone size
  • #70 by Degree — Top 100 by unique BGP neighbor count
  • #2 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
October 10, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 867 / 999
IPv6 Prefixes (raw / aggregated)
69 / 53
IPv4 Addresses
8 550 400
Largest IPv4 Prefix
/14 (262 144 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (4 616 032 IPs), 🇬🇧 United Kingdom (1 441 728 IPs), 🇩🇪 Germany (657 664 IPs) and 96 more
Prefix Changed
October 11, 2026

Reputation

Reputation
Good — 16 flagged IPs out of 8 550 400 total (0.00%)

Connectivity Summary

Peers
35 networks exchanging traffic without transit
Downstream Customers
1 812 downstreams buying transit
Unclassified
44 unclassified BGP neighbors
Degree
1 891 unique BGP neighbors
Reach
43 934 networks in customer cone

Prefix Lists

IPv4 Prefixes (1 867 total)

  • 67.100.0.0/14 (262 144 addresses (/14 prefix))
  • 68.164.0.0/14 (262 144 addresses (/14 prefix))
  • 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))
  • 64.204.0.0/15 (131 072 addresses (/15 prefix))
  • 64.248.0.0/15 (131 072 addresses (/15 prefix))
  • 65.84.0.0/15 (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))
  • 72.244.0.0/15 (131 072 addresses (/15 prefix))
  • 74.0.0.0/15 (131 072 addresses (/15 prefix))
  • 87.82.0.0/15 (131 072 addresses (/15 prefix))
  • 212.134.0.0/15 (131 072 addresses (/15 prefix))
  • 64.51.0.0/16 (65 536 addresses (/16 prefix))
  • 64.81.0.0/16 (65 536 addresses (/16 prefix))
  • 64.105.0.0/16 (65 536 addresses (/16 prefix))
  • 64.144.0.0/16 (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))
  • 66.95.0.0/16 (65 536 addresses (/16 prefix))
  • 66.134.0.0/16 (65 536 addresses (/16 prefix))
  • 66.200.0.0/16 (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))
  • 74.2.0.0/16 (65 536 addresses (/16 prefix))
  • 81.188.0.0/16 (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))
  • 86.53.0.0/16 (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))
  • 149.235.0.0/16 (65 536 addresses (/16 prefix))
  • 154.14.0.0/16 (65 536 addresses (/16 prefix))
  • 155.229.0.0/16 (65 536 addresses (/16 prefix))
  • 194.231.0.0/16 (65 536 addresses (/16 prefix))
  • 195.21.0.0/16 (65 536 addresses (/16 prefix))
  • 195.40.0.0/16 (65 536 addresses (/16 prefix))
  • 195.81.0.0/16 (65 536 addresses (/16 prefix))
  • 195.86.0.0/16 (65 536 addresses (/16 prefix))
  • 195.143.0.0/16 (65 536 addresses (/16 prefix))
  • 195.172.0.0/16 (65 536 addresses (/16 prefix))
  • 205.179.0.0/16 (65 536 addresses (/16 prefix))
  • 206.135.0.0/16 (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))
  • 208.41.0.0/16 (65 536 addresses (/16 prefix))
  • 209.101.0.0/16 (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))

IPv6 Prefixes (69 total)

  • 2001:668::/29
  • 2a04:6640::/29
  • 2a05:18c0::/29
  • 2a0a:1f40::/29
  • 2a13:fc00::/29
  • 2a14:4340::/29
  • 2a14:4b00::/29
  • 2a14:5200::/29
  • 2a04:1120::/30
  • 2a0c:8640::/30
  • 2a0f:b242::/31
  • 2001:590::/32
  • 2001:680::/32
  • 2001:6f8::/32
  • 2001:aa0::/32
  • 2001:1478::/32
  • 2001:4890::/32
  • 2400:f780::/32
  • 2405:5e00::/32
  • 2604:cf80::/32
  • 2605:d480::/32
  • 2606:6200::/32
  • 2607:f588::/32
  • 2610:38::/32
  • 2a00:16c8::/32
  • 2a00:1750::/32
  • 2a00:43c0::/32
  • 2a00:8d00::/32
  • 2a00:bb40::/32
  • 2a02:9e8::/32
  • 2a02:d28::/32
  • 2a02:6280::/32
  • 2a04:a3c7::/32
  • 2a06:2b81::/32
  • 2a06:9f47::/32
  • 2a0a:6041::/32
  • 2a0d:d901::/32
  • 2a0f:b247::/32
  • 2a14:d281::/32
  • 2602:ffb7:590::/46
  • 2001:67c:1514::/48
  • 2600:1407:1c::/48
  • 2620:131:2024::/48
  • 2620:135:7003::/48
  • 2a00:4b00:171::/48
  • 2a00:7580:16::/48
  • 2a04:e00:2::/48
  • 2a05:a882:de10::/48
  • 2a06:1180:12bb::/48
  • 2a0a:2d04:9825::/48