AS11975
The College of William and Mary
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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
AS11975 — global IP footprint
Cities where AS11975 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.239.0.0/16 | 65.5K |
5.0%
|
The College of William and Mary | US | Virginia | Moseley |
| 139.70.0.0/16 | 65.5K |
2.0%
|
The College of William and Mary | US | Virginia | Newport News |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS11975 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 |
|---|---|---|
| 128.239.1.0/24 | 10,831 | 2026-07-23 16:51:13 |
| 139.70.0.0/17 | 10,227 | 2026-07-23 16:51:12 |
| 139.70.128.0/17 | 10,145 | 2026-07-23 16:51:12 |
| 128.239.0.0/17 | 9,729 | 2026-07-23 16:51:12 |
| 128.239.128.0/17 | 9,723 | 2026-07-23 16:51:12 |
| 139.70.224.0/19 | 9,502 | 2026-07-23 16:50:56 |
| 139.70.0.0/16 | 6,264 | 2026-07-23 16:51:12 |
| 128.239.0.0/16 | 6,122 | 2026-07-23 16:51:12 |
| 128.239.33.0/24 | 5,597 | 2026-07-23 15:51:50 |
| 128.239.49.0/24 | 2,005 | 2026-07-21 20:23:33 |
| 128.239.44.0/22 | 1,979 | 2026-07-21 20:23:33 |
| 128.239.26.0/24 | 1,973 | 2026-07-21 20:23:33 |
| 128.239.50.0/24 | 1,973 | 2026-07-21 20:23:33 |
| 128.239.52.0/22 | 1,941 | 2026-07-21 20:23:33 |
| 128.239.4.0/24 | 1,939 | 2026-07-21 20:23:33 |
| 128.239.2.0/24 | 1,935 | 2026-07-21 20:23:33 |
| 128.239.3.0/24 | 1,933 | 2026-07-21 20:23:33 |
| 128.239.51.0/24 | 1,927 | 2026-07-21 20:23:33 |
| 128.239.96.0/20 | 1,901 | 2026-07-21 20:23:33 |
| 128.239.128.0/18 | 1,900 | 2026-07-21 20:23:33 |
| 128.239.112.0/20 | 1,899 | 2026-07-21 20:23:33 |
| 128.239.64.0/18 | 1,898 | 2026-07-21 20:23:33 |
| 128.239.0.0/18 | 1,898 | 2026-07-21 20:23:33 |
| 128.239.192.0/18 | 1,892 | 2026-07-21 20:23:33 |
| 128.239.20.0/24 | 1,892 | 2026-07-21 20:23:33 |
| 128.239.23.0/24 | 1,892 | 2026-07-21 20:23:33 |
| 128.239.19.0/24 | 1,891 | 2026-07-21 20:23:33 |
| 128.239.29.0/24 | 1,891 | 2026-07-21 20:23:33 |
| 128.239.10.0/24 | 1,891 | 2026-07-21 20:23:33 |
| 128.239.184.0/21 | 1,890 | 2026-07-21 20:23:33 |
| 128.239.140.0/22 | 1,890 | 2026-07-21 20:23:33 |
| 128.239.136.0/22 | 1,890 | 2026-07-21 20:23:33 |
| 128.239.56.0/22 | 1,889 | 2026-07-21 20:23:33 |
| 128.239.21.0/24 | 1,887 | 2026-07-21 20:23:33 |
| 128.239.144.0/23 | 1,887 | 2026-07-21 20:23:33 |
| 128.239.39.0/24 | 1,884 | 2026-07-21 20:23:33 |
Frequently Asked Questions
What is AS11975?
AS11975 is an Autonomous System Number assigned to The College of William and Mary. 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 AS11975 announce?
AS11975 announces 131.1K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in United States.
Who operates AS11975?
AS11975 is operated by The College of William and Mary. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS11975 registered in?
AS11975 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
