Home Prefix Lookup104.251.72.0/21

104.251.72.0/21 - Shenandoah Cable Television (AS4922)

IPv4announcedAS4922SHENTEL - Shenandoah Cable Television LLCNo ROA

CIDR

104.251.72.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

York

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
104.251.72.0/21	AS4922 SHENTEL - Shenandoah Cable Television LLC	No ROA	-	2026-10-11

Related Announcements

1 less-specific, 5 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
104.251.64.0/20	AS4922 SHENTEL - Shenandoah Cable Television LLC	No ROA	-	2026-10-11
104.251.72.0/22	AS4922 SHENTEL - Shenandoah Cable Television LLC	Valid	-	2026-10-11
104.251.76.0/24	AS4922 SHENTEL - Shenandoah Cable Television LLC	Valid	-	2026-10-11
104.251.77.0/24	AS4922 SHENTEL - Shenandoah Cable Television LLC	Valid	-	2026-10-11
104.251.78.0/24	AS4922 SHENTEL - Shenandoah Cable Television LLC	Valid	-	2026-10-11
104.251.79.0/24	AS4922 SHENTEL - Shenandoah Cable Television LLC	Valid	-	2026-10-11

More Specific Prefixes

Prefix	AS	Country	Status
104.251.72.0/22	AS15091	🇺🇸US	allocated
104.251.76.0/24	AS4922	🇺🇸US	allocated
104.251.77.0/24	AS15091	🇺🇸US	allocated
104.251.78.0/24	AS15091	🇺🇸US	allocated
104.251.79.0/24	AS4922	🇺🇸US	allocated

Transfer History

Registry transfers of 104.251.72.0/21, blocks inside it, or blocks containing it.

104.251.78.0/24M&A · 2026-02-19
Shenandoah Cable Television LLC
🇺🇸 US ARIN
→
Shentel Asset Entity I LLC
🇺🇸 US ARIN
104.251.77.0/24M&A · 2026-02-19
Shenandoah Cable Television LLC
🇺🇸 US ARIN
→
Shentel Asset Entity I LLC
🇺🇸 US ARIN
104.251.72.0/22M&A · 2026-02-19
Shenandoah Cable Television LLC
🇺🇸 US ARIN
→
Shentel Asset Entity I LLC
🇺🇸 US ARIN
104.251.64.0/20M&A · 2021-04-13
Shentel Communications, LLC
🇺🇸 US ARIN
→
Shenandoah Cable Television LLC
🇺🇸 US ARIN
104.251.64.0/20M&A · 2016-08-29
Shentel Service Company
🇺🇸 US ARIN
→
Shentel Communications, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2026-02-19	104.251.78.0/24	Shenandoah Cable Television LLC 🇺🇸 US ARIN	Shentel Asset Entity I LLC 🇺🇸 US ARIN	M&A
2026-02-19	104.251.77.0/24	Shenandoah Cable Television LLC 🇺🇸 US ARIN	Shentel Asset Entity I LLC 🇺🇸 US ARIN	M&A
2026-02-19	104.251.72.0/22	Shenandoah Cable Television LLC 🇺🇸 US ARIN	Shentel Asset Entity I LLC 🇺🇸 US ARIN	M&A
2021-04-13	104.251.64.0/20	Shentel Communications, LLC 🇺🇸 US ARIN	Shenandoah Cable Television LLC 🇺🇸 US ARIN	M&A
2016-08-29	104.251.64.0/20	Shentel Service Company 🇺🇸 US ARIN	Shentel Communications, LLC 🇺🇸 US ARIN	M&A

Origin ASN

AS4922

SHENTEL - Shenandoah Cable Television LLC

Related Prefixes

Covering prefix

104.251.64.0/20AS4922

More prefixes of AS4922

All prefixes of AS4922 →

Geolocation

Country🇺🇸United StatesUS

RegionPennsylvania

CityYork

Coordinates39.9626, -76.7277 ↗

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/104.251.72.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/104.251.72.0/21" | jq

External Links

RIPEstat