Data as of Nov 5, 2026
209.2.224.0/21
No anonymizer space · no proxy exits in 30 daysColumbia University · space held by Lamont-Doherty Earth Observatory of Columbia University
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 |
|---|---|---|---|---|---|---|
| 209. | 8,192 | LDGO | Lamont-Doherty Earth Observatory of Columbia University (LDGO) · US | Direct Allocation | Nov 20, 2025 | noc@ |
| └ 209.2.224.0/21 | 2,048 | CU-NET-209-2-224 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 209.2.224.0/20
- Prefix
- 209.2.224.0/20
- Announced by
- AS14 Columbia University
- Type
- Business
- RPKI
- No RPKI
- Netname
- LDGO
- Registrant
- Lamont-Doherty Earth Observatory of Columbia University
- RIR
- ARIN
Origin network
AS14
US
- Name
- Columbia University
- Type
- Education
- Domain
- columbia.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 209.2.224.0/20
209.2.224.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on 209.2.224.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS14 | RADB | CU-NET-209-2-224-0 | MAINT-AS14 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 209.
2. 208. 0 - 209. 2. 239. 255 - Netname
- LDGO
- Registrant
- Lamont-Doherty Earth Observatory of Columbia University
- Organization
- Lamont-Doherty Earth Observatory of Columbia University (LDGO)
- Org address
- Route 9W, Palisades, NY, 10964
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-209-2-208-0-2
- Parent
- NET-209-0-0-0-0
- Created
- Nov 20, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Nov 20, 2025
- Status
- assigned
Report abuse
Abuse contact
- noc@
columbia. edu - Name
- Columbia University Computer Operations
- Phone
- +1-212-854-1919
- Handle
- CU-NOC-ARIN