Data as of Nov 13, 2026
199.105.136.0/24
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 199. | 262,144 | NETBLK-CERFNET-CBLK2 | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Jan 10, 1994 | abuse@ |
| └ 199.105.136.0/24 | 256 | CERF-FOUNTAIN-A | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 199.105.0.0/16
- Prefix
- 199.105.0.0/16
- Announced by
- AS7018 AT&T Enterprises, LLC
- Type
- Residential
- RPKI
- No RPKI
- Netname
- NETBLK-CERFNET-CBLK2
- Registrant
- AT&T Enterprises, LLC
- RIR
- ARIN
Origin network
AS7018
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Jul 30, 1996
- Domain
- att.com
- Website
- www.att.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 199.105.0.0/16
199.105.0.0/16
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 199.
105. 0. 0 - 199. 108. 255. 255 - Netname
- NETBLK-CERFNET-CBLK2
- Registrant
- AT&T Enterprises, LLC
- Organization
- AT&T Enterprises, LLC (AEL-360)
- Org address
- 208 S. Akard St., Dallas, TX, 75202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-199-105-0-0-1
- Parent
- NET-199-0-0-0-0
- Created
- Jan 10, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 10, 1994
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN