Data as of Nov 7, 2026
12.189.183.0/24
No anonymizer space · no proxy exits in 30 daysMassachusetts Mutual Life Insurance Company · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 12.128.0.0/9 | AS7018 | Residential | IP broker Rackdog (part) | 5,243 285 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,307 719 always on | AT&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 |
|---|---|---|---|---|---|---|
| 12.0.0.0/8 | 16,777,216 | ATT | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Aug 23, 1983 | abuse@ |
| └ 12.189.182.0/23 | 512 | ATT-NET-12-189-182-0-23 | Massachusetts Mutual Life Insurance Company (MMLI-8) · US | Reassigned | Apr 2, 2025 | — |
Network & registry
Announced by
Covering announcement 12.189.182.0/23
- Prefix
- 12.189.182.0/23
- Announced by
- AS22575 Massachusetts Mutual Life Insurance Company
- Type
- Business
- RPKI
- No RPKI
- Netname
- ATT-NET-12-189-182-0-23
- Registrant
- Massachusetts Mutual Life Insurance Company
- RIR
- ARIN
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 12.
0. 0. 0/ 8 - Registration type
- Direct Allocation
- Record created
- Aug 23, 1983
- Legacy
- yes
Origin network
AS22575
US
- Name
- Massachusetts Mutual Life Insurance Company
- Type
- Business
- Registered
- Oct 16, 2001
- Domain
- massmutual.com
- Industry
- Finance and Insurance
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
12.189.182.0/23
Routing history
- Pattern
- Rotating
- First seen
- May 2008
- Current origin since
- May 2026 · 6 mo
- Origin networks
- 2
- Last change of origin
- May 2026
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 12.
189. 182. 0/ 23 - Netname
- ATT-NET-12-189-182-0-23
- Registrant
- Massachusetts Mutual Life Insurance Company
- Organization
- Massachusetts Mutual Life Insurance Company (MMLI-8)
- Org address
- 1295 State Street, Springfield, MA, 01111
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-189-182-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Apr 2, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN