Data as of Nov 8, 2026
144.121.239.0/24
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 |
|---|---|---|---|---|---|
| 144.121.236.0/22 since Jul 2025 | AS46887 | Internet provider | 2 | Zayo Bandwidth | |
| 144.121.192.0/18 since Dec 2017 | AS46887 | Internet provider | 43 8 always on | Zayo Bandwidth | |
| 144.121.0.0/16 since Nov 2021 | AS46887 | Internet provider | 131 25 always on | Zayo Bandwidth |
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 |
|---|---|---|---|---|---|---|
| 144.121.0.0/16 | 65,536 | ZAYO-CCF-144-121-0-0 | Zayo Bandwidth (ZAYOB) · US | Direct Allocation | Apr 29, 2016 | abuse@ |
| └ 144.121.239.0/24 | 256 | NET-0-144-121-239-0-24 | Albany City School District (C07265759) · US | Reassigned | Dec 20, 2018 | abuse@ via ZAYO-CCF-144-121-0-0 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Registry
Holder
- Organization
- Zayo Bandwidth
- Handle
- ZAYOB
- Range
- 144.
121. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Apr 29, 2016
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
Summary
Routing history
- Pattern
- Stable
- First seen
- Dec 2018
- Current origin since
- Dec 2018 · 7.9 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS46887 | RADB | CCFL-10 Albany City School District | MAINT-AS27506 | May 23, 2025 |
Whois
Registration for this announcement
- Range
- 144.
121. 239. 0/ 24 - Netname
- NET-0-144-121-239-0-24
- Registrant
- Albany City School District
- Organization
- Albany City School District (C07265759)
- Type
- Reassigned
- Handle
- NET-144-121-239-0-1
- Parent
- NET-144-121-0-0-1
- Created
- Dec 20, 2018
- 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