Data as of Nov 8, 2026
129.246.128.0/17
No anonymizer space · no proxy exits in 30 daysInstitute for Defense Analyses
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 129.246.225.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.228.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.229.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.230.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.235.0/24 since Mar 2026 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.243.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.253.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses | |
| 129.246.254.0/24 since Apr 2023 | AS166 | Business | Institute for Defense Analyses |
Network & registry
Origin network
AS166
US
- Name
- Institute for Defense Analyses
- Type
- Business
- Registered
- Mar 29, 1988
- Domain
- ida.org
- Industry
- Government and Regulatory Agencies, Administrations, Departments, and Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2009
- Current origin since
- Feb 2018 · 8.8 yr
- Origin networks
- 2
- Last change of origin
- Feb 2018
Recorded history
History
- Handoffs
- 2
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 129.246.218.0/24 | AS7029 | RADB | Proxy fbo Windstream Customer | MAINT-AS7029 | Nov 13, 2023 |
| 129.246.250.0/24 | AS7029 | RADB | Proxy fbo Windstream Customer | MAINT-AS7029 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 129.
246. 0. 0/ 16 - Netname
- IDA
- Registrant
- Institute for Defense Analyses
- Organization
- Institute for Defense Analyses (IDA-2-Z)
- Org address
- 730 E Glebe Rd, Alexandria, VA, 22305
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-129-246-0-0-1
- Parent
- NET-129-0-0-0-0
- Created
- Mar 29, 1988
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 29, 1988
- Status
- assigned
Report abuse
Abuse contact
- cmurphy@
ida. org - Name
- Murphy, Chris
- Phone
- +1-703-845-6833
- Handle
- CMU49-ARIN