AS40237
United Telephone Company
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 →
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS40237 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) |
|---|---|---|
| 209.217.0.0/18 | AS7258, AS40237 | 2026-09-10 11:40:44 |
Network profile
Source: PeeringDB →Present at 1 internet exchange: Digital Realty Atlanta
AS40237 — global IP footprint
Cities where AS40237 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 AS40237 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 |
|---|---|---|
| 138.28.128.0/18 | 21,044 | 2026-09-10 11:34:25 |
| 76.72.176.0/20 | 21,014 | 2026-09-10 11:34:25 |
| 170.117.240.0/21 | 20,987 | 2026-09-10 11:34:25 |
| 38.53.128.0/18 | 20,973 | 2026-09-10 11:34:25 |
| 208.86.64.0/21 | 20,927 | 2026-09-10 11:34:25 |
| 206.251.208.0/20 | 20,794 | 2026-09-10 11:34:25 |
| 162.247.208.0/21 | 20,752 | 2026-09-10 11:34:25 |
| 199.45.192.0/19 | 12,243 | 2026-09-10 11:34:25 |
| 66.128.240.0/20 | 7,790 | 2026-09-10 11:34:25 |
| 74.51.0.0/20 | 7,474 | 2026-09-10 11:22:35 |
| 152.36.64.0/18 | 5,750 | 2026-09-10 11:34:24 |
| 209.217.0.0/18 | 5,686 | 2026-09-10 11:23:20 |
Frequently Asked Questions
What is AS40237?
AS40237 is an Autonomous System Number assigned to United Telephone Company. 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 AS40237 announce?
AS40237 announces 63.5K IPv4 addresses distributed across 503 routed CIDR prefixes. The network is registered in United States.
Who operates AS40237?
AS40237 is operated by United Telephone Company. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS40237 registered in?
AS40237 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
