Autonomous System

AS3257 GTT Communications Inc.

ISPActiveUnited StatesRIPE

AS3257 (GTT-BACKBONE) is an ISP network operated by GTT Communications Inc. in United States, registered with RIPE. It has 1,786 IPv4 prefixes with 9,202,304 addresses and 54 IPv6 prefixes, which makes it the 72nd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses9,202,304in 1,786 prefixes
IPv6 prefixes54≈ 7.9 × 10³⁰ addresses
Size rank#72of 82,200 active ASNs
Abuser scoreLow0.2% of its addresses flagged · method

Details

OrganizationGTT Communications Inc.
AS nameGTT-BACKBONE
Websitegtt.net
Country United States (US)
Network typeISP
RegistryRIPE
Abuse contactabuse@gtt.net
Registered2002-09-20
Last updated2026-09-08

IPv4 prefixes

1,786 prefixes · 9,202,304 addresses
NetworkAddressesFirst – last address
67.100.0.0/14262,14467.100.0.0 – 67.103.255.255
68.164.0.0/14262,14468.164.0.0 – 68.167.255.255
87.84.0.0/14262,14487.84.0.0 – 87.87.255.255
217.204.0.0/14262,144217.204.0.0 – 217.207.255.255
64.204.0.0/15131,07264.204.0.0 – 64.205.255.255
64.248.0.0/15131,07264.248.0.0 – 64.249.255.255
65.84.0.0/15131,07265.84.0.0 – 65.85.255.255
66.92.0.0/15131,07266.92.0.0 – 66.93.255.255
66.166.0.0/15131,07266.166.0.0 – 66.167.255.255
72.244.0.0/15131,07272.244.0.0 – 72.245.255.255
74.0.0.0/15131,07274.0.0.0 – 74.1.255.255
82.108.0.0/15131,07282.108.0.0 – 82.109.255.255
87.82.0.0/15131,07287.82.0.0 – 87.83.255.255
87.84.0.0/15131,07287.84.0.0 – 87.85.255.255
212.134.0.0/15131,072212.134.0.0 – 212.135.255.255
64.51.0.0/1665,53664.51.0.0 – 64.51.255.255
64.81.0.0/1665,53664.81.0.0 – 64.81.255.255
64.105.0.0/1665,53664.105.0.0 – 64.105.255.255
64.144.0.0/1665,53664.144.0.0 – 64.144.255.255
65.86.0.0/1665,53665.86.0.0 – 65.86.255.255
66.80.0.0/1665,53666.80.0.0 – 66.80.255.255
66.95.0.0/1665,53666.95.0.0 – 66.95.255.255
66.134.0.0/1665,53666.134.0.0 – 66.134.255.255
66.200.0.0/1665,53666.200.0.0 – 66.200.255.255
69.3.0.0/1665,53669.3.0.0 – 69.3.255.255
The 25 largest of 1,786. The API and the database have all of them.

IPv6 prefixes

54 prefixes
  • 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
  • 2001:590::/32
  • 2001:668::/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
The 25 largest of 54. The API and the database have all of them.

Query AS3257 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS3257&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS3257, with or without a key:

curl "https://api.ipapi.is/?q=67.100.0.1"

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