AS11951
Medical Computer Systems
AS11951 is Medical Computer Systems (mcsp.com). It announces 37,376 IPv4 addresses in 10 prefixes, and 0 IPv6 prefixes.
United States· ARIN· allocated 1999-02-12· isp
37,376
IPv4 addresses announced
10
IPv4 prefixes
0
IPv6 prefixes
0.00%
of its routes RPKI-valid
37,376
of its IPv4 geolocated
1
country
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States37,376 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- MCSP
- name
- Medical Computer Systems
- org
- MDCS
- org name
- Medical Computer Systems
- org address
- 1729 21st Street, NW, Washington, DC, 20009
- org city
- Washington
- org country
- US
- country
- US
- source
- arin
- created
- 1999-02-12
- updated
- 2021-07-14
- abuse name
- Paul Wolotsky
- abuse email
- pdw@mcsp.com
- abuse phone
- +1-949-365-1249
- abuse kind
- person
- abuse city
- Laguna Beach
- abuse country
- US
- admin name
- Paul Wolotsky
- admin email
- pdw@mcsp.com
- admin phone
- +1-949-365-1249
- admin kind
- person
- admin city
- Laguna Beach
- admin country
- US
- tech
- PW25-ARIN
- tech name
- Paul Wolotsky
- tech email
- pdw@mcsp.com
- tech phone
- +1-949-365-1249
- tech kind
- person
- tech city
- Laguna Beach
- tech country
- US
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP100.03%
- None here
- None here
- None here
- None here
- None here
- Hosting IP1,0242.74%
- None here
- None here
- None here
- 0.01%
- 0.00%
- 0.01%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 66.186.128.0/20 | United States | not found | 17 | 2026-10-02 |
| 66.186.129.0/24 | United States | not found | 17 | 2026-10-02 |
| 204.152.42.0/23 | United States | not found | 17 | 2026-10-02 |
| 204.152.42.0/24 | United States | not found | 17 | 2026-10-02 |
| 205.147.160.0/19 | United States | not found | 17 | 2026-10-02 |
| 207.152.128.0/18 | United States | not found | 17 | 2026-10-02 |
| 207.152.134.0/24 | United States | not found | 17 | 2026-10-02 |
| 207.152.135.0/24 | United States | not found | 17 | 2026-10-02 |
| 209.50.192.0/19 | United States | not found | 17 | 2026-10-02 |
| 209.50.193.0/24 | United States | not found | 17 | 2026-10-02 |
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