Data as of Nov 12, 2026
144.121.71.136/29
No anonymizer space · no proxy exits in 30 daysCrown Castle Fiber LLC · space held by Zayo Bandwidth
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 144.121.64.0/18 since May 2016 | AS46887 | Internet provider | 36 7 always on | Zayo Bandwidth | |
| 144.121.0.0/16 since Nov 2021 | AS46887 | Internet provider | 139 23 always on | Zayo Bandwidth |
Network & registry
Announced by
Covering announcement 144.121.64.0/20
- Prefix
- 144.121.64.0/20
- Announced by
- AS46887 Crown Castle Fiber LLC
- Type
- Internet provider
- Proxy exits
- 9
- Always-on exits
- 3
- RPKI
- No RPKI
- Netname
- ZAYO-CCF-144-121-0-0
- Registrant
- Zayo Bandwidth
- RIR
- ARIN
Origin network
AS46887
US
- Name
- Crown Castle Fiber LLC
- Type
- Internet provider
- Registered
- Apr 13, 2009
- Domain
- zayo.com
- Website
- www.crowncastle.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
144.121.64.0/20
Routing history
- Pattern
- Stable
- First seen
- Sep 2024
- Current origin since
- Sep 2024 · 2.2 yr
- Origin networks
- 1
IRR
Route objects on 144.121.64.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS46887 | RADB | MAINT-AS27506 | Sep 3, 2025 |
Whois
Registration for this announcement
- Range
- 144.
121. 0. 0/ 16 - Netname
- ZAYO-CCF-144-121-0-0
- Registrant
- Zayo Bandwidth
- Organization
- Zayo Bandwidth (ZAYOB)
- Org address
- 1401 Wynkoop St., Denver, CO, 80202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-144-121-0-0-1
- Parent
- NET-144-0-0-0-0
- Created
- Apr 29, 2016
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 29, 2016
- Status
- assigned
Report abuse
Abuse contact
- abuse@
zayo. com - Name
- Abuse
- Phone
- +1-866-236-2824
- Handle
- ABUSE5675-ARIN