Data as of Nov 7, 2026
38.97.121.0/24
No anonymizer space · no proxy exits in 30 daysBoston Properties Limited Partnership · space held by Cogent Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 38.97.120.0/23 since Aug 2008 | AS30140 | Business | 1 | Cogent Communications, LLC | ||
| 38.0.0.0/8 | AS174 | Internet provider | IP broker Rackdog (part) | 404,266 78,035 always on | Cogent Communications, LLC |
Network & registry
Origin network
AS30140
US
- Name
- Boston Properties Limited Partnership
- Type
- Business
- Registered
- Jul 28, 2003
- Domain
- bostonproperties.com
- Industry
- Construction and Real Estate
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2008
- Current origin since
- Nov 2020 · 6.0 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS30140 | ALTDB | Proxy registration to prevent harm from ARIN-NONAUTH shutdown | MAINT-AS7034 | Apr 4, 2022 |
Whois
Registration for this announcement
- Range
- 38.
0. 0. 0/ 8 - Netname
- COGENT-A
- Registrant
- Cogent Communications, LLC
- Organization
- Cogent Communications, LLC (COGC)
- Org address
- 2450 N Street NW, Washington, DC, 20037
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-38-0-0-0-1
- Created
- Apr 16, 1991
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 16, 1991
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN