Data as of Nov 7, 2026
209.51.51.0/24
No anonymizer space · no proxy exits in 30 daysCognizant
Network & registry
IPv4 market
Holder
- Organization
- Not stated by the registry
Origin network
AS11690
US
- Name
- Cognizant
- Type
- Business
- Registered
- Sep 21, 2012
- Domain
- cognizant.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2015
- Current origin since
- Oct 2015 · 11 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS11690 | RADB | CyrusOne - Proxy for Customer | MAINT-AS62 | Nov 13, 2023 |
Whois
Registration for this announcement
The registry reserved or took this space back, and 209.51.51.0/24 is announced over it anyway.
- RIR
- ARIN
- Country
- ZZ
- Delegated
- Nov 6, 2026
- Status
- Reserved by the registry