AS19977 Mayer Brown LLP 🇺🇸 US
Announcing 10 prefixes, seen at the RIS collectors.
IPv4 prefixes
10
4,096 (16 × /24)
IPv6 prefixes
0
-
Upstreams
2
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it
Registry and operator data
- AS number
- AS19977
- Name
- Mayer Brown LLP
- Organisation
- Mayer Brown LLP
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 2016-08-02
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
10 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 143.58.0.0/22 v4 | RPKI valid | 43 | 3454917419977 | 2026-09-18 |
| 143.58.0.0/24 v4 | RPKI valid | 41 | 3454917419977 | 2026-09-18 |
| 143.58.1.0/24 v4 | RPKI valid | 41 | 3454917419977 | 2026-09-18 |
| 143.58.2.0/24 v4 | RPKI valid | 41 | 3454917419977 | 2026-09-18 |
| 143.58.3.0/24 v4 | RPKI valid | 41 | 3454917419977 | 2026-09-18 |
| 143.58.4.0/22 v4 | RPKI valid | 42 | 3454917419977 | 2026-09-18 |
| 143.58.4.0/24 v4 | RPKI valid | 44 | 37721335619977 | 2026-09-18 |
| 143.58.5.0/24 v4 | RPKI valid | 44 | 37721335619977 | 2026-09-18 |
| 143.58.6.0/24 v4 | RPKI valid | 44 | 37721335619977 | 2026-09-18 |
| 143.58.7.0/24 v4 | RPKI valid | 44 | 37721335619977 | 2026-09-18 |