Home Prefix Lookup204.12.144.0/20

204.12.144.0/20 - Shaw Communications (AS6327)

IPv4ARINallocatedAS6327SHAW - Shaw CommunicationsNo ROA

CIDR

204.12.144.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇨🇦 Canada

City

Calgary (Downtown)

RIR

ARIN

Status

allocated

Allocated

2009-06-08

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
204.12.144.0/20	AS6327 SHAW - Shaw Communications	No ROA	Other IRR	2026-10-12

More-Specific Announcements

14 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
204.12.144.0/22	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.144.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.148.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.149.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.150.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.151.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.152.0/24	AS29988 RCC-RDC-AS - Rogers Communications Canada Inc.	No ROA	-	2026-10-12
204.12.153.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.154.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.155.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.156.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.157.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.158.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12
204.12.159.0/24	AS6327 SHAW - Shaw Communications	No ROA	-	2026-10-12

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS6327	Other IRR	MAINT-AS812	2026-03-10

Transfer History

Registry transfers of 204.12.144.0/20, blocks inside it, or blocks containing it.

204.12.144.0/20M&A · 2025-06-03
Shaw Communications Inc.
🇨🇦 CA ARIN
→
Shaw Communications
🇨🇦 CA ARIN
204.12.144.0/20M&A · 2021-12-10
Enmax Envision Inc.
🇨🇦 CA ARIN
→
Shaw Communications Inc.
🇨🇦 CA ARIN

Date	Resource	From	To	Type
2025-06-03	204.12.144.0/20	Shaw Communications Inc. 🇨🇦 CA ARIN	Shaw Communications 🇨🇦 CA ARIN	M&A
2021-12-10	204.12.144.0/20	Enmax Envision Inc. 🇨🇦 CA ARIN	Shaw Communications Inc. 🇨🇦 CA ARIN	M&A

Origin ASN

AS6327

SHAW - Shaw Communications

Related Prefixes

More prefixes of AS6327

All prefixes of AS6327 →

Geolocation

Country🇨🇦CanadaCA

RegionAlberta

CityCalgary (Downtown)

Coordinates51.0457, -114.0710 ↗

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 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/204.12.144.0/20

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

curl -s "https://api.ipctl.io/v1/prefix/204.12.144.0/20" | jq

External Links

RIPEstat