AS19977
Mayer Brown LLP
AS19977 is Mayer Brown LLP (mayerbrown.com). It announces 2,048 IPv4 addresses in 10 prefixes, and 0 IPv6 prefixes.
United States· ARIN· allocated 2016-08-02· Business
2,048
IPv4 addresses announced
10
IPv4 prefixes
0
IPv6 prefixes
100.00%
of its routes RPKI-valid
2,048
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 States2,048 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- MBRML-AS
- name
- Mayer Brown LLP
- org
- MBRML
- org name
- Mayer Brown LLP
- org address
- 71 S. Wacker, Chicago, IL, 60606
- org city
- Chicago
- org country
- US
- country
- US
- source
- arin
- created
- 2016-08-02
- updated
- 2016-08-02
- abuse name
- Michael Sherman
- abuse email
- msherman@mayerbrown.com
- abuse phone
- +1-312-701-8315
- abuse kind
- person
- abuse city
- Chicago
- abuse country
- US
- admin name
- Mark Barratt
- admin email
- mbarratt@mayerbrown.com
- admin phone
- +1-312-701-8836
- admin kind
- person
- admin city
- Chicago
- admin country
- US
- tech name
- Michael Sherman
- tech email
- msherman@mayerbrown.com
- tech phone
- +1-312-701-8315
- tech kind
- person
- tech city
- Chicago
- tech country
- US
- abuse unvalidated since
- 2023-02-17
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.
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- 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 |
|---|---|---|---|---|
| 143.58.0.0/22 | United States | Valid | 17 | 2026-10-02 |
| 143.58.0.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.1.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.2.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.3.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.4.0/22 | United States | Valid | 17 | 2026-10-02 |
| 143.58.4.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.5.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.6.0/24 | United States | Valid | 17 | 2026-10-02 |
| 143.58.7.0/24 | United States | Valid | 17 | 2026-10-02 |
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