Home Prefix Lookup204.144.128.0/17

204.144.128.0/17 - BGP Prefix

IPv4not announced RPKI Valid

CIDR

204.144.128.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇺🇸 United States

City

Louisville

Status

not announced

Allocated

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

36 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
204.144.128.0/22	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.132.0/23	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.134.0/24	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.135.0/24	AS19733 DCU-LCO1 - Digital Federal Credit Union	Valid	-	2026-10-12
204.144.136.0/22	AS21757 HTC-COMM - HTC Communications	No ROA	-	2026-10-12
204.144.140.0/23	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.143.0/24	AS30302 ASPEN-DENTAL-INC - ASPEN DENTAL MANAGEMENT, INC.	No ROA	-	2026-10-12
204.144.144.0/24	AS30302 ASPEN-DENTAL-INC - ASPEN DENTAL MANAGEMENT, INC.	No ROA	-	2026-10-12
204.144.148.0/23	AS401500 KARRIER-ONE-01 - Karrier One Inc.	No ROA	-	2026-10-12
204.144.151.0/24	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.152.0/21	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.152.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.153.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.154.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.155.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.157.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.158.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.159.0/24	AS397050 VELOCITY-01 - The Butler Rural Electric Cooperative Assn., Inc.	Valid	-	2026-10-12
204.144.160.0/20	AS36556 WAVE-RURAL-CONNECT-LLC - Wave Rural Connect, LLC	Valid	-	2026-10-12
204.144.176.0/23	AS20283 CTC-INTERNET-MN - CONSOLIDATED TELEPHONE COMPANY	Valid	-	2026-10-12
204.144.178.0/24	AS206455 PL-KALWINEK-AS Lukasz Kalwinek trading as KALWINEK.NET	No ROA	-	2026-10-12
204.144.179.0/24	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.180.0/24	AS399726 XTREAM-INTERNET-01 - XtreamInternet	Valid	-	2026-10-12
204.144.181.0/24	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.182.0/24	AS399726 XTREAM-INTERNET-01 - XtreamInternet	Valid	-	2026-10-12
204.144.183.0/24	AS399726 XTREAM-INTERNET-01 - XtreamInternet	Valid	-	2026-10-12
204.144.184.0/24	AS21777 MASSIVE-NETWORKS-21777 - Massive Networks, Inc.	Valid	-	2026-10-12
204.144.185.0/24	AS53583 WESTJET - Westjet Airlines Limited	No ROA	-	2026-10-12
204.144.186.0/23	AS29852 HONEST - Honest Networks, LLC	No ROA	-	2026-10-12
204.144.186.0/24	AS29852 HONEST - Honest Networks, LLC	No ROA	-	2026-10-12
204.144.187.0/24	AS29852 HONEST - Honest Networks, LLC	No ROA	-	2026-10-12
204.144.188.0/22	AS137074 RISE-AS-AP - Responsible Internet Sustainability Effort	Valid	-	2026-10-12
204.144.189.0/24	AS137074 RISE-AS-AP - Responsible Internet Sustainability Effort	Valid	-	2026-10-12
204.144.190.0/24	AS137074 RISE-AS-AP - Responsible Internet Sustainability Effort	Valid	-	2026-10-12
204.144.191.0/24	AS137074 RISE-AS-AP - Responsible Internet Sustainability Effort	Valid	-	2026-10-12
204.144.192.0/18	AS393238 IMONC - ImOn Communications, LLC	Valid	-	2026-10-12

More Specific Prefixes

Prefix	AS	Country	Status
204.144.128.0/22	AS21777	🇺🇸US	allocated
204.144.132.0/23	AS21777	🇺🇸US	allocated
204.144.134.0/24	AS21777	🇺🇸US	allocated
204.144.135.0/24	AS19733	🇺🇸US	allocated
204.144.136.0/22	AS21757	🇺🇸US	allocated
204.144.140.0/23	AS21777	🇺🇸US	allocated
204.144.142.0/23	AS30302	🇺🇸US	allocated
204.144.144.0/22	AS30302	🇺🇸US	allocated
204.144.148.0/23	AS401500	🇺🇸US	allocated
204.144.150.0/24	AS401202	🇺🇸US	allocated
204.144.151.0/24	AS22658	🇺🇸US	allocated
204.144.152.0/21	AS397050	🇺🇸US	allocated
204.144.160.0/20	AS36556	🇺🇸US	allocated
204.144.176.0/23	AS20283	🇺🇸US	allocated
204.144.178.0/24	AS206455	🇵🇱PL	assigned
204.144.179.0/24	AS21777	🇺🇸US	allocated
204.144.180.0/22		🇺🇸US	allocated
204.144.184.0/24	AS21777	🇺🇸US	allocated
204.144.185.0/24	AS53583	🇨🇦CA	allocated
204.144.186.0/23	AS29852	🇺🇸US	allocated
204.144.188.0/22	AS137074	🇵🇭PH	allocated
204.144.190.0/24	AS137074	🇵🇭PH	assigned
204.144.192.0/18	AS393238	🇺🇸US	allocated

Transfer History

Registry transfers of 204.144.128.0/17, blocks inside it, or blocks containing it.

204.144.152.0/21M&A · 2026-03-27
The Butler Rural Electric Cooperative Assn., Inc.
🇺🇸 US ARIN
→
IdeaTek Telcom, LLC
🇺🇸 US ARIN
204.144.140.0/23M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.128.0/22M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.179.0/24M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.180.0/22M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.184.0/24M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.134.0/24M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.132.0/23M&A · 2026-02-25
Massive Networks
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.151.0/24M&A · 2026-02-19
Earthnet, Inc.
🇺🇸 US ARIN
→
Massive Networks, Inc.
🇺🇸 US ARIN
204.144.148.0/23Transfer · 2024-12-17
Earthnet, Inc.
🇺🇸 US ARIN
→
Karrier One Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2026-03-27	204.144.152.0/21	The Butler Rural Electric Cooperative Assn., Inc. 🇺🇸 US ARIN	IdeaTek Telcom, LLC 🇺🇸 US ARIN	M&A
2026-02-25	204.144.140.0/23	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.128.0/22	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.179.0/24	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.180.0/22	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.184.0/24	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.134.0/24	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-25	204.144.132.0/23	Massive Networks 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2026-02-19	204.144.151.0/24	Earthnet, Inc. 🇺🇸 US ARIN	Massive Networks, Inc. 🇺🇸 US ARIN	M&A
2024-12-17	204.144.148.0/23	Earthnet, Inc. 🇺🇸 US ARIN	Karrier One Inc. 🇺🇸 US ARIN	Transfer

View all 32 transfers →

Geolocation

Country🇺🇸United StatesUS

RegionColorado

CityLouisville

Coordinates39.9654, -105.1240 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/204.144.128.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/204.144.128.0/17" | jq

External Links

RIPEstat