Data as of Nov 5, 2026
143.58.9.0/24
No anonymizer space · no proxy exits in 30 daysMayer Brown International LLP · space held by Mayer Brown LLP
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 143.58.8.0/22 since May 2023 | AS29120 | Business | 1 | Mayer Brown LLP |
Network & registry
Origin network
AS29120
GB
- Name
- Mayer Brown International LLP
- Type
- Business
- Registered
- Jun 10, 2003
- Domain
- mayerbrown.com
- Industry
- Service
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Feb 2007
- Current origin since
- Feb 2007 · 20 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 143.58.9.0/24 | AS29120 | /24 | ARIN | RPKI valid |
| 143.58.8.0/22 | AS29120 | /22 | ARIN | Too specific |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS29120 | ARIN | EMEA | MNT-MBRML | Sep 19, 2026 |
Whois
Registration for this announcement
- Range
- 143.
58. 0. 0/ 18 - Netname
- MBRM-NET
- Registrant
- Mayer Brown LLP
- Organization
- Mayer Brown LLP (MBRML)
- Org address
- 71 S. Wacker, Chicago, IL, 60606
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-143-58-0-0-1
- Parent
- NET-143-0-0-0-0
- Created
- Mar 26, 1990
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 26, 1990
- Status
- assigned
Report abuse
Abuse contact
- nobody@
example. com - Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN