Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Active-threat / abuse risk −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Global Telecom & Technology
GTT Communications, Inc. (GTT), formerly Global Telecom and Technology, is a Network as a Service (NaaS) and Security as a Service (SECaaS) provider headquartered in Arlington, Virginia.
⚠ 27 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS3257 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 194.42.83.0/24 | AS286, AS3257 | 2026-09-08 08:40:21 |
| 95.177.63.0/24 | AS286, AS984, AS3257 | 2026-09-08 08:40:21 |
| 194.158.18.0/24 | AS286, AS3257 | 2026-09-08 08:40:21 |
| 194.121.123.0/24 | AS286, AS3257, AS25038 | 2026-09-08 08:40:21 |
| 66.167.90.0/24 | AS3257, AS9541 | 2026-09-08 08:40:21 |
| 67.102.7.0/24 | AS3257, AS9541 | 2026-09-08 08:40:21 |
| 144.225.190.0/24 | AS3257, AS9304 | 2026-09-08 08:40:21 |
| 194.121.203.0/24 | AS3257, AS12480 | 2026-09-08 08:40:21 |
| 160.48.160.0/23 | AS1136, AS3257 | 2026-09-08 08:40:21 |
| 204.193.36.0/23 | AS3257, AS26651 | 2026-09-08 08:40:21 |
| 23.252.78.0/24 | AS3257, AS19257 | 2026-09-08 08:40:21 |
| 66.167.147.0/24 | AS3257, AS9541 | 2026-09-08 07:25:21 |
| 50.114.118.0/24 | AS3257, AS212238 | 2026-09-08 06:55:20 |
| 154.14.51.0/24 | AS286, AS3257 | 2026-09-07 23:55:19 |
| 66.92.53.0/24 | AS3257, AS401884 | 2026-09-07 22:25:18 |
Showing the 15 most recently detected of 27 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.
Network profile
Source: PeeringDB →Present at 2 internet exchanges: LINX LON1: Main, DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN
AS3257 — global IP footprint
Cities where AS3257 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS3257 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 89.149.148.0/24 | 144,270 | 2026-09-08 08:34:49 |
| 192.101.145.0/24 | 139,514 | 2026-09-08 05:57:29 |
| 13.143.232.0/24 | 58,478 | 2026-09-03 14:04:58 |
| 23.252.77.0/24 | 39,719 | 2026-09-08 02:39:49 |
| 93.187.169.0/24 | 39,418 | 2026-09-08 06:26:39 |
| 23.252.78.0/24 | 39,071 | 2026-09-08 02:39:49 |
| 66.80.133.0/24 | 27,495 | 2026-09-08 01:00:54 |
| 52.119.96.0/24 | 24,863 | 2026-09-08 06:26:59 |
| 128.177.95.0/24 | 24,686 | 2026-09-08 01:01:23 |
| 135.196.56.0/21 | 23,861 | 2026-09-08 01:30:30 |
| 142.131.238.0/23 | 23,085 | 2026-09-08 08:03:42 |
| 173.205.34.0/24 | 22,854 | 2026-09-08 01:01:46 |
| 173.205.21.0/24 | 22,840 | 2026-09-08 01:01:46 |
| 38.72.160.0/19 | 22,154 | 2026-09-08 06:26:39 |
| 66.80.172.0/22 | 22,127 | 2026-09-08 01:00:54 |
| 66.227.119.0/24 | 22,121 | 2026-09-08 01:00:54 |
| 66.134.92.0/23 | 22,120 | 2026-09-08 01:00:54 |
| 66.134.88.0/23 | 22,114 | 2026-09-08 01:00:54 |
| 69.174.90.0/24 | 22,051 | 2026-09-08 06:26:48 |
| 66.167.202.0/23 | 22,051 | 2026-09-08 01:00:54 |
| 66.134.66.0/23 | 22,049 | 2026-09-08 01:00:54 |
| 66.167.80.0/23 | 22,047 | 2026-09-08 01:00:54 |
| 66.167.6.0/23 | 22,044 | 2026-09-08 01:00:54 |
| 66.253.1.0/24 | 22,032 | 2026-09-08 01:00:54 |
| 68.64.133.0/24 | 22,031 | 2026-09-08 01:00:54 |
| 66.253.0.0/24 | 22,029 | 2026-09-08 01:00:54 |
| 70.39.156.0/24 | 21,985 | 2026-09-08 01:00:54 |
| 70.39.255.0/24 | 21,981 | 2026-09-08 01:00:54 |
| 70.39.154.0/24 | 21,979 | 2026-09-08 01:00:54 |
| 70.39.254.0/24 | 21,978 | 2026-09-08 01:00:54 |
| 70.39.191.0/24 | 21,975 | 2026-09-08 01:00:54 |
| 70.39.242.0/24 | 21,967 | 2026-09-08 01:00:54 |
| 70.39.170.0/24 | 21,956 | 2026-09-08 01:00:54 |
| 154.206.248.0/21 | 21,906 | 2026-09-08 05:09:50 |
| 154.206.240.0/21 | 21,900 | 2026-09-08 05:09:50 |
| 69.17.66.0/24 | 21,897 | 2026-09-08 01:00:54 |
| 69.17.65.0/24 | 21,895 | 2026-09-08 01:00:54 |
| 72.13.224.0/24 | 21,747 | 2026-09-08 01:00:54 |
| 72.13.246.0/24 | 21,746 | 2026-09-08 01:00:54 |
| 72.13.234.0/24 | 21,724 | 2026-09-08 01:00:54 |
| 2.27.196.0/22 | 20,076 | 2026-09-08 02:38:18 |
| 80.81.77.0/24 | 19,397 | 2026-09-08 07:40:37 |
| 80.81.76.0/24 | 19,392 | 2026-09-08 07:40:37 |
| 195.190.155.0/24 | 18,573 | 2026-09-08 05:57:16 |
| 62.41.32.0/24 | 18,338 | 2026-09-08 02:20:57 |
| 86.53.28.0/24 | 18,233 | 2026-07-13 06:46:15 |
| 92.71.48.0/21 | 18,090 | 2026-09-08 01:00:54 |
| 195.160.193.0/24 | 17,705 | 2026-09-08 07:43:14 |
| 67.102.7.0/24 | 17,538 | 2026-09-08 08:19:25 |
| 64.81.126.0/24 | 17,458 | 2026-09-08 06:27:06 |
Showing top 50 of 1,907 announced prefixes by sample volume.
Frequently Asked Questions
What is AS3257?
AS3257 is an Autonomous System Number assigned to GTT Communications Inc.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS3257 announce?
AS3257 announces 4.91M IPv4 addresses distributed across 5,049 routed CIDR prefixes. The network is registered in United States.
Who operates AS3257?
AS3257 is operated by GTT Communications Inc.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS3257 registered in?
AS3257 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
