Data as of Nov 9, 2026
203.163.0.0/18
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC · space held by AT&T Japan K.K.
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 203.163.0.0/18 | 16,384 | ATT-MPN-AP | AT&T Japan K.K. (ORG-AJK1-AP) · JP | ALLOCATED PORTABLE | — | peering@ |
| └ 203.163.61.6/32 | 1 | JP-ZVC | Zexel Vareo Orimate CNTR | ASSIGNED NON-PORTABLE | — | peering@ |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
16,384 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Internet provider | 16,383 | >99% | 2 | |
| Business | 1 | <0.01% | 1 |
Network & registry
Origin network
AS2687
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Jun 2, 1993
- Domain
- att.com
- Website
- www.att.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2020
- Current origin since
- Aug 2020 · 6.3 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS2687 | RADB | To allow routing to other ISPs | MAINT-AS7132 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 203.
163. 0. 0/ 18 - Netname
- ATT-MPN-AP
- Registrant
- AT&T Japan K.K.
- Registrant country
- JP
- Organization
- Not stated by the registry
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Jul 7, 2020
- Maintainer
- APNIC-HM
- RIR
- APNIC
- Country
- JP
- Delegated
- Jul 30, 1998
- Status
- assigned
Report abuse
Abuse contact
- peering@
intl. att. com - Name
- ABUSE ATTOPENNETAP
- Handle
- AA1420-AP