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AS3257 GTT-BACKBONE GTT Communications Inc.

Everything the routing table and the registries say about AS3257: who holds it, which registry issued it, and which address blocks it advertises.

Transit and backboneAS3257

1773 IPv4 and 80 IPv6 prefixes announced.

Registry facts

Refreshed daily
AS number
AS3257
Holder
GTT-BACKBONE GTT Communications Inc.
Country
Not published
Regional registry
RIPE — RIPE Network Coordination Centre
Registry block
3154-3353 (IANA 16-bit Autonomous System (AS) Numbers Registry)
Announced today
Yes
IPv4 prefixes
1773
IPv6 prefixes
80
Observed at
2026-09-05T16:00:00

Data: RIPEstat. Prefix and holder data comes from the RIPEstat Data API and is cached for 24 hours. The regional registry is derived from the IANA AS number allocation table. Authoritative registry records are served by RIPE RDAP.

Announced prefixes

1773 IPv4 · 80 IPv6
  • 120 IPv4 shown
  • 80 IPv6 shown
  • 2.26.180.0/24
  • 2.26.184.0/24
  • 2.26.220.0/23
  • 2.26.240.0/22
  • 2.26.244.0/22
  • 2.27.172.0/24
  • 2.27.196.0/22
  • 2.27.218.0/23
  • 2.27.220.0/23
  • 2.27.222.0/23
  • 2.27.232.0/24
  • 2.27.235.0/24
  • 2.27.238.0/24
  • 2.27.247.0/24
  • 2.56.236.0/22
  • 2.58.75.0/24
  • 5.83.96.0/21
  • 5.178.16.0/21
  • 5.180.4.0/22
  • 5.252.77.0/24
  • 5.253.202.0/24
  • 8.19.112.0/24
  • 8.19.203.0/24
  • 8.31.122.0/24
  • 8.35.16.0/21
  • 8.35.24.0/21
  • 8.35.30.0/24
  • 8.37.186.0/24
  • 13.143.152.0/21
  • 13.143.177.0/24
  • 13.143.232.0/24
  • 23.26.5.0/24
  • 23.26.6.0/24
  • 23.26.7.0/24
  • 23.26.8.0/23
  • 23.26.11.0/24
  • 23.26.12.0/24
  • 23.26.13.0/24
  • 23.26.16.0/22
  • 23.26.21.0/24
  • 23.26.22.0/24
  • 23.26.198.0/24
  • 23.27.3.0/24
  • 23.27.8.0/24
  • 23.27.30.0/24
  • 23.27.114.0/24
  • 23.27.134.0/24
  • 23.27.216.0/24
  • 23.27.238.0/24
  • 23.184.144.0/24
  • 23.230.1.0/24
  • 23.230.64.0/24
  • 23.230.121.0/24
  • 23.230.186.0/24
  • 23.230.234.0/24
  • 23.230.235.0/24
  • 23.231.111.0/24
  • 23.231.115.0/24
  • 23.231.120.0/24
  • 23.234.128.0/22
  • 23.234.132.0/22
  • 23.234.136.0/22
  • 23.234.140.0/22
  • 23.234.156.0/22
  • 23.252.77.0/24
  • 23.252.78.0/24
  • 31.58.54.0/24
  • 31.58.131.0/24
  • 31.58.139.0/24
  • 31.58.169.0/24
  • 31.58.221.0/24
  • 31.58.222.0/24
  • 31.77.20.0/22
  • 31.77.24.0/22
  • 31.77.215.0/24
  • 31.77.224.0/23
  • 31.77.242.0/23
  • 31.77.250.0/24
  • 37.1.152.0/21
  • 37.252.30.0/24
  • 38.72.160.0/19
  • 38.188.202.0/24
  • 38.244.113.0/24
  • 38.244.114.0/24
  • 38.244.115.0/24
  • 38.244.121.0/24
  • 38.244.126.0/24
  • 45.8.164.0/22
  • 45.38.206.0/24
  • 45.38.234.0/24
  • 45.39.66.0/24
  • 45.39.77.0/24
  • 45.39.95.0/24
  • 45.39.161.0/24
  • 45.39.174.0/24
  • 45.41.12.0/22
  • 45.41.60.0/22
  • 45.41.132.0/22
  • 45.41.136.0/22
  • 45.41.144.0/22
  • 45.41.164.0/22
  • 45.41.174.0/23
  • 45.41.180.0/23
  • 45.56.128.0/22
  • 45.56.136.0/23
  • 45.56.140.0/22
  • 45.56.146.0/24
  • 45.56.148.0/22
  • 45.56.152.0/21
  • 45.56.160.0/23
  • 45.56.168.0/22
  • 45.56.176.0/22
  • 45.56.180.0/24
  • 45.56.182.0/23
  • 45.61.64.0/22
  • 45.61.102.0/23
  • 45.61.115.0/24
  • 45.86.16.0/22
  • 45.93.47.0/24
  • 45.95.23.0/24
  • 2001:1478::/32
  • 2001:1478:1801::/48
  • 2001:1478:201::/48
  • 2001:1478:700::/48
  • 2001:4890::/32
  • 2001:590::/32
  • 2001:590:3400::/38
  • 2001:668::/29
  • 2001:668::/32
  • 2001:668:126::/48
  • 2001:668:128::/50
  • 2001:668:128:4000::/50
  • 2001:668:128:8000::/50
  • 2001:668:128:c000::/50
  • 2001:668:130::/48
  • 2001:668:1f:fc23::/64
  • 2001:668:1f:fc31::/64
  • 2001:668:1f:fc32::/64
  • 2001:668:1f:fc33::/64
  • 2001:668:1f:fd24::/64
  • 2001:668:1f:ff77::/64
  • 2001:668:1f:ff80::/64
  • 2001:67c:1514::/48
  • 2001:680::/32
  • 2001:680:16::/48
  • 2001:6f8::/32
  • 2001:6f8:1800::/39
  • 2001:6f8:1903::/48
  • 2001:6f8:200::/39
  • 2001:6f8:206::/48
  • 2001:aa0::/32
  • 2001:aa0:7000::/36
  • 2400:f780::/32
  • 2405:5e00::/32
  • 2600:1407:1c::/48
  • 2602:ffb7:590::/46
  • 2604:cf80::/32
  • 2605:d480::/32
  • 2606:6200::/32
  • 2607:f588::/32
  • 2610:38::/32
  • 2620:131:2024::/48
  • 2620:135:7003::/48
  • 2a00:16c8::/32
  • 2a00:16c8:10b::/48
  • 2a00:16c8:10c::/48
  • 2a00:1750::/32
  • 2a00:43c0::/32
  • 2a00:4b00:171::/48
  • 2a00:7580:16::/48
  • 2a00:8d00::/32
  • 2a00:bb40::/32
  • 2a02:6280::/32
  • 2a02:9e8::/32
  • 2a02:d28::/32
  • 2a04:1120::/30
  • 2a04:6640::/29
  • 2a04:a3c7::/32
  • 2a04:e00:2::/48
  • 2a05:18c0::/29
  • 2a05:a882:de10::/48
  • 2a06:1180:12bb::/48
  • 2a06:2b81::/32
  • 2a06:9f47::/32
  • 2a0a:1f40::/29
  • 2a0a:2d04:9825::/48
  • 2a0a:6041::/32
  • 2a0c:7881:98dd::/48
  • 2a0c:8640::/30
  • 2a0d:d901::/32
  • 2a0e:15c0:1213::/48
  • 2a0f:7d00:32ba::/48
  • 2a0f:b242::/32
  • 2a0f:b243::/32
  • 2a0f:b247::/32
  • 2a13:fc00::/29
  • 2a14:4340::/29
  • 2a14:4b00::/29
  • 2a14:5200::/29
  • 2a14:d281::/32

A prefix here is a block this AS was seen originating in BGP, not a block it is guaranteed to own. Announcement and allocation are different facts, and they disagree more often than people expect.

Registry record

ripe
FieldValue
aut-num3257
as-nameGTT-BACKBONE
descrGTT
orgORG-GCI2-RIPE
importfrom AS12 accept AS12
importfrom AS14 accept AS14
importfrom AS57 accept AS-NLG-TO-TRANSIT
importfrom AS62 accept AS-C1
importfrom AS97 accept AS97
importfrom AS249 accept AS249:AS-CUSTOMERS
importfrom AS260 accept AS-XCONNECT24
importfrom AS286 accept AS286
importfrom AS288 accept AS288
importfrom AS376 accept AS376:AS-CLIENTS
importfrom AS517 accept AS517
importfrom AS559 accept AS-SWITCH
importfrom AS572 accept AS572
importfrom AS577 accept AS577:AS-CUSTOMERS
importfrom AS600 accept AS600
importfrom AS766 accept AS766
importfrom AS792 accept AS792
importfrom AS812 accept AS-ROGERS:AS-CUSTOMERS
importfrom AS819 accept AS819
importfrom AS835 accept AS-GOCODEIT-ALL

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