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 v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
About Merit Network
Merit Network, Inc., is a nonprofit member-governed organization providing high-performance computer networking and related services to educational, government, health care, and nonprofit organizations, primarily in Michigan. Created in 1966, Merit operates the longest running regional computer network in the United States.
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS237 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) |
|---|---|---|
| 23.135.208.0/24 | AS210, AS237 | 2026-11-13 10:39:08 |
Network profile
Source: PeeringDB →Present at 4 internet exchanges: Any2Chicago, Equinix Chicago, DET-iX, Grand Rapids Internet Exchange (GRR-iX)
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS237 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 |
|---|---|---|
| 161.133.112.0/21 | 33,148 | 2026-11-13 10:21:12 |
| 161.133.104.0/21 | 30,853 | 2026-11-13 09:31:45 |
| 206.201.157.0/24 | 27,691 | 2026-11-13 09:19:41 |
| 35.50.0.0/17 | 23,413 | 2026-11-13 09:19:41 |
| 164.76.160.0/19 | 22,485 | 2026-11-13 09:31:45 |
| 141.210.32.0/19 | 21,580 | 2026-11-13 09:19:41 |
| 35.50.0.0/18 | 21,302 | 2026-11-13 09:19:41 |
| 192.88.242.0/24 | 20,553 | 2026-11-13 09:44:55 |
| 141.210.224.0/19 | 20,451 | 2026-11-13 09:19:41 |
| 35.50.64.0/18 | 19,889 | 2026-11-13 09:19:41 |
| 164.76.0.0/16 | 19,293 | 2026-11-13 09:19:41 |
| 192.188.100.0/24 | 16,757 | 2026-11-13 09:19:41 |
| 35.33.5.0/24 | 16,349 | 2026-11-13 09:19:41 |
| 35.33.6.0/24 | 16,110 | 2026-11-13 09:19:41 |
| 192.160.204.0/24 | 15,707 | 2026-11-13 09:19:41 |
| 192.245.254.0/24 | 15,674 | 2026-11-13 09:19:41 |
| 192.160.192.0/24 | 15,624 | 2026-11-13 09:19:41 |
| 192.245.252.0/24 | 15,607 | 2026-11-13 09:19:41 |
| 192.138.137.0/24 | 15,596 | 2026-11-13 09:19:41 |
| 35.39.32.0/19 | 15,322 | 2026-11-13 09:19:41 |
| 35.39.64.0/19 | 15,322 | 2026-11-13 09:19:41 |
| 35.39.0.0/19 | 15,117 | 2026-11-13 09:19:41 |
| 35.39.192.0/19 | 15,085 | 2026-11-13 09:19:41 |
| 35.39.224.0/19 | 15,040 | 2026-11-13 09:19:41 |
| 35.39.128.0/19 | 15,032 | 2026-11-13 09:19:41 |
| 35.39.160.0/19 | 15,025 | 2026-11-13 09:19:41 |
| 35.40.0.0/16 | 14,998 | 2026-11-13 09:19:41 |
| 192.122.200.0/24 | 14,984 | 2026-11-13 09:19:19 |
| 35.38.0.0/16 | 14,971 | 2026-11-13 09:19:41 |
| 161.133.129.0/24 | 14,928 | 2026-11-13 09:31:45 |
| 35.16.0.0/16 | 14,878 | 2026-11-13 09:19:41 |
| 35.24.128.0/18 | 14,722 | 2026-11-13 09:19:41 |
| 161.133.128.0/17 | 14,633 | 2026-11-13 09:31:45 |
| 35.33.0.0/18 | 14,536 | 2026-11-13 10:15:35 |
| 148.61.0.0/16 | 14,492 | 2026-11-13 09:19:41 |
| 35.24.224.0/19 | 14,492 | 2026-11-13 09:19:41 |
| 35.24.192.0/19 | 14,484 | 2026-11-13 09:19:41 |
| 35.24.0.0/17 | 14,477 | 2026-11-13 09:19:41 |
| 161.133.2.0/24 | 14,474 | 2026-11-13 09:31:45 |
| 161.133.0.0/17 | 14,468 | 2026-11-13 09:31:45 |
| 141.210.128.0/17 | 14,434 | 2026-11-13 09:31:45 |
| 141.210.0.0/17 | 14,397 | 2026-11-13 09:31:45 |
| 161.133.120.0/21 | 14,372 | 2026-11-13 09:31:45 |
| 35.33.96.0/19 | 14,054 | 2026-11-13 09:19:41 |
| 35.62.0.0/16 | 13,970 | 2026-11-13 09:19:19 |
| 74.115.236.0/23 | 13,815 | 2026-11-13 09:19:41 |
| 35.46.0.0/18 | 13,772 | 2026-11-13 09:19:41 |
| 204.39.195.0/24 | 13,771 | 2026-11-13 09:19:41 |
| 141.217.0.0/16 | 13,745 | 2026-11-13 09:19:27 |
| 35.58.0.0/16 | 13,628 | 2026-11-13 09:19:19 |
Showing top 50 of 84 announced prefixes by sample volume.
Frequently Asked Questions
What is AS237?
AS237 is an Autonomous System Number assigned to Merit Network 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 AS237 announce?
AS237 announces 2.21M IPv4 addresses distributed across 78 routed CIDR prefixes. The network is registered in United States.
Who operates AS237?
AS237 is operated by Merit Network Inc.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS237 registered in?
AS237 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
