Data as of Nov 12, 2026
199.173.231.0/24
No anonymizer space · no proxy exits in 30 daysSocial Security Administration · space held by Verizon Business
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 199.173.224.0/21 since Feb 2016 | AS11985 | Business | 1 | Verizon Business | |
| 199.172.0.0/15 since May 2005 | AS701 | Internet provider | 456 129 always on | Verizon Business |
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-UUCBLK170-173 | Verizon Business (MCICS) · US | Direct Allocation | Feb 10, 1994 | abuse@ |
| └ 199.173.224.0/21 | 2,048 | UU-199-173-224-D2 | Social Security Administration (SSA-6) · US | Reassigned | Oct 8, 1998 | jason. |
Network & registry
Announced by
Covering announcement 199.173.228.0/22
- Prefix
- 199.173.228.0/22
- Announced by
- AS11985 Social Security Administration
- Type
- Business
- Proxy exits
- 1
- RPKI
- No RPKI
- Netname
- UU-199-173-224-D2
- Registrant
- Social Security Administration
- RIR
- ARIN
IPv4 market
Holder
- Organization
- Verizon Business
- Handle
- MCICS
- Range
- 199.
170. 0. 0 - 199. 173. 255. 255 - Registration type
- Direct Allocation
- Record created
- Feb 10, 1994
- Legacy
- yes
Origin network
AS11985
US
- Name
- Social Security Administration
- Type
- Business
- Registered
- Feb 22, 1999
- Domain
- ssa.gov
- Industry
- Government and Regulatory Agencies, Administrations, Departments, and Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
199.173.228.0/22
Routing history
- Pattern
- Stable
- First seen
- Feb 2016
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
IRR
Route objects on 199.173.228.0/22
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS11985 | ARIN | Verizon Internet Services | MNT-MCICS | Oct 18, 2018 |
Whois
Registration for this announcement
- Range
- 199.
173. 224. 0/ 21 - Netname
- UU-199-173-224-D2
- Registrant
- Social Security Administration
- Organization
- Social Security Administration (SSA-6)
- Org address
- 6401 Security Boulevard, Baltimore, MD, 21235
- Org country
- US
- Type
- Reassigned
- Handle
- NET-199-173-224-0-1
- Parent
- NET-199-170-0-0-1
- Created
- Oct 8, 1998
- RIR
- ARIN
- Country
- US
- Delegated
- Feb 10, 1994
- Status
- assigned
Report abuse
Abuse contact
- jason.
devnew@ ssa. gov - Name
- Devnew, Jason Edward
- Phone
- +1-410-966-1852
- Handle
- JED77-ARIN