HomePrefix Lookup144.121.0.0/18

144.121.0.0/18

🇺🇸
IPv4ARINannouncedAS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA
CIDR
144.121.0.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇺🇸 United States
City
Springfield (Metro Center)
RIR
ARIN
Status
announced
Allocated
-

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
144.121.0.0/18AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA
RADB
5/31/2026

Covering Prefix

20 less-specific announcements
PrefixOrigin ASRPKIIRRLast Seen
144.121.0.0/16AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.48.0/20AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.32.0/21AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.12.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.16.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.20.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.24.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.28.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.44.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.0.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.4.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.8.0/22AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.27.0/24AS15027FH-ASN-15027 - Foley Hoag LLPNo ROA—5/31/2026
144.121.61.0/24AS27015FMCH-27015 - FRESENIUS MEDICAL CARE HOLDINGS, INCNo ROA—5/31/2026
144.121.49.0/24AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.41.0/24AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.40.0/24AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLCNo ROA—5/31/2026
144.121.4.0/24AS54573GTECH-PRODUCTION - Brightstar Global Solutions CorporationNo ROA—5/31/2026
144.121.30.0/24AS62653HARRG-CHESHIRE - Housing Authority Risk Retention Group, Inc.No ROA—5/31/2026
144.121.43.0/24AS64293MHB-AS1 - Mobile HeartbeatNo ROA—5/31/2026

IRR Route Objects

1
OriginRegistryMaintainerModified
AS46887RADBMAINT-AS275065/23/2025
Origin ASN
AS46887
CROWNCASTLE-AS46887 - Crown Castle Fiber LLC
Geolocation
Country🇺🇸United StatesUS
RegionMassachusetts
CitySpringfield (Metro Center)
Coordinates42.1017, -72.5874 ↗
API
Open
GEThttps://api.ipctl.io/v1/prefix/144.121.0.0/18

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/144.121.0.0/18" | jq
External Links
RIPEstat Hurricane Electric BGP