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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.82.0.0/16 | 65.5K |
4.6%
|
Old Dominion University | US | Virginia | Norfolk |
| 157.21.0.0/16 | 65.5K |
0.0%
|
Old Dominion University | US | Virginia | Virginia Beach |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS1201 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 |
|---|---|---|
| 128.82.14.0/23 | 35,852 | 2026-11-10 18:59:53 |
| 128.82.30.0/23 | 35,375 | 2026-11-10 18:59:53 |
| 128.82.34.0/23 | 35,362 | 2026-11-10 18:59:53 |
| 128.82.21.0/24 | 35,335 | 2026-11-10 18:59:53 |
| 128.82.38.0/23 | 35,178 | 2026-11-10 18:59:53 |
| 128.82.18.0/23 | 35,068 | 2026-11-10 18:59:53 |
| 128.82.101.0/24 | 24,079 | 2026-11-10 18:17:04 |
| 128.82.16.0/23 | 22,934 | 2026-11-10 18:17:04 |
| 128.82.12.0/23 | 22,684 | 2026-11-10 18:17:04 |
| 128.82.20.0/24 | 22,609 | 2026-11-10 18:17:04 |
| 128.82.36.0/23 | 22,471 | 2026-11-10 18:17:04 |
| 128.82.32.0/23 | 22,455 | 2026-11-10 18:17:04 |
| 128.82.28.0/23 | 22,431 | 2026-11-10 18:17:04 |
| 128.82.0.0/21 | 20,497 | 2026-11-10 18:59:55 |
| 128.82.48.0/21 | 20,325 | 2026-11-10 18:59:55 |
| 128.82.64.0/18 | 20,324 | 2026-11-10 18:59:55 |
| 128.82.40.0/21 | 20,288 | 2026-11-10 18:59:55 |
| 128.82.128.0/17 | 20,285 | 2026-11-10 18:59:55 |
| 128.82.56.0/21 | 20,219 | 2026-11-10 18:59:55 |
| 128.82.8.0/22 | 19,921 | 2026-11-10 18:59:55 |
| 128.82.0.0/16 | 13,824 | 2026-11-10 18:59:55 |
| 128.82.75.0/24 | 13,792 | 2026-11-10 18:16:28 |
| 128.82.60.0/24 | 13,385 | 2026-11-10 18:59:55 |
| 128.82.61.0/24 | 11,552 | 2026-11-10 18:59:55 |
| 157.21.193.0/24 | 8,414 | 2026-09-06 12:55:35 |
| 157.21.0.0/16 | 6,015 | 2026-11-10 18:48:59 |
| 157.21.194.0/24 | 4,802 | 2026-09-06 12:55:35 |
| 128.82.54.0/24 | 4,432 | 2026-11-10 18:16:43 |
| 128.82.52.0/23 | 3,617 | 2026-11-10 18:16:23 |
| 157.21.195.0/24 | 3,560 | 2026-09-06 10:46:14 |
| 157.21.196.0/24 | 3,415 | 2026-09-06 10:54:45 |
| 157.21.197.0/24 | 3,236 | 2026-09-06 10:55:24 |
| 157.21.191.0/24 | 2,880 | 2026-09-06 12:55:41 |
| 157.21.192.0/24 | 2,536 | 2026-09-06 12:55:41 |
| 157.21.198.0/24 | 2,397 | 2026-09-06 11:00:43 |
| 162.62.248.0/24 | 2,315 | 2026-08-13 09:33:31 |
| 157.21.0.0/18 | 1,821 | 2026-11-10 18:17:04 |
| 157.21.64.0/18 | 1,819 | 2026-11-10 18:17:04 |
| 157.21.128.0/18 | 1,782 | 2026-11-10 18:17:04 |
| 157.21.192.0/18 | 1,761 | 2026-11-10 18:17:04 |
| 157.21.128.0/17 | 1,597 | 2026-11-10 18:17:26 |
| 157.21.0.0/17 | 1,563 | 2026-11-10 18:17:26 |
Frequently Asked Questions
What is AS1201?
AS1201 is an Autonomous System Number assigned to Old Dominion University. 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 AS1201 announce?
AS1201 announces 131.1K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in United States.
Who operates AS1201?
AS1201 is operated by Old Dominion University. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS1201 registered in?
AS1201 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
