Data as of Nov 7, 2026
205.241.51.0/24
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 205.240.0.0/13 | AS174 | Internet provider | 35 3 always on | Cogent Communications, LLC |
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 |
|---|---|---|---|---|---|---|
| 205.240.0.0/13 | 524,288 | COGENT-205-240-0 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Apr 24, 1995 | abuse@ |
| └ 205.241.51.0/24 | 256 | SPRINTLINK | National Academy of Sciences (NAS-13) · US | Reassigned | Nov 8, 2017 | cmiletti@ |
Network & registry
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 205.
240. 0. 0/ 13 - Registration type
- Direct Allocation
- Record created
- Apr 24, 1995
- Legacy
- yes
Origin network
AS174
US
- Name
- Cogent Communications, LLC
- Type
- Internet provider
- Registered
- May 16, 1996
- Domain
- cogentco.com
- Website
- www.cogentco.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1,658
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Mar 2024
- Current origin since
- Mar 2024 · 2.6 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 205.
241. 51. 0/ 24 - Netname
- SPRINTLINK
- Registrant
- National Academy of Sciences
- Organization
- National Academy of Sciences (NAS-13)
- Org address
- 500 5th Street, NW, Washington, DC, 20001
- Org country
- US
- Type
- Reassigned
- Handle
- NET-205-241-51-0-1
- Parent
- NET-205-240-0-0-1
- Created
- Nov 8, 2017
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 24, 1995
- Status
- assigned
Report abuse
Abuse contact
- cmiletti@
nas. edu - Name
- Miletti, Carlos
- Phone
- +1-202-334-2713
- Handle
- CMI26-ARIN