AS402021
Mt. Wilson Observatory
AS402021 is Mt. Wilson Observatory (mtwilson.edu). It announces 256 IPv4 addresses in 1 prefix, and 0 IPv6 prefixes.
United States· ARIN· allocated 2025-09-24· education
256
IPv4 addresses announced
1
IPv4 prefix
0
IPv6 prefixes
0.00%
of its routes RPKI-valid
256
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 States256 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- MT-WILSON-OBSERVATORY
- name
- Mt. Wilson Observatory
- org
- MWO
- org name
- Mt. Wilson Observatory
- org address
- 75 S Grand Avenue, Pasadena, CA, 91105
- org city
- Pasadena
- org country
- US
- country
- US
- source
- arin
- created
- 2025-09-24
- updated
- 2025-09-26
- abuse
- BARRU11-ARIN|JCT8-ARIN
- abuse name
- Christopher Barrus
- abuse email
- cbarrus@mtwilson.edu
- abuse phone
- +1-626-214-8030
- abuse kind
- person
- abuse city
- Pasadena
- abuse country
- US
- admin name
- John Thompson
- admin email
- jthompson@mtwilson.edu
- admin phone
- +1-626-214-8030
- admin kind
- person
- admin city
- Pasadena
- admin country
- US
- tech
- BARRU11-ARIN|JCT8-ARIN
- tech name
- Christopher Barrus
- tech email
- cbarrus@mtwilson.edu
- tech phone
- +1-626-214-8030
- tech kind
- person
- tech city
- Pasadena
- tech country
- US
- abuse validated
- 1
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.
- 0.78%
- proxyempire0.39%
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- 1.95%
- None here
- None here
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 192.153.157.0/24 | United States | not found | 16 | 2026-10-02 |
00 · Evaluate
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01 · License
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