Home Prefix Lookup192.56.128.0/17

192.56.128.0/17 - BGP Prefix

IPv4ARINallocatedNo ROA

CIDR

192.56.128.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇯🇵 Japan

City

Chiyoda City

RIR

ARIN

Status

allocated

Allocated

1989-06-27

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

53 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
192.56.128.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.129.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.130.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.131.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.132.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.134.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.135.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.136.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.137.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.138.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.139.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.140.0/24	AS2687 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.148.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.149.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.168.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.169.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.170.0/24	AS2155 HPINC - HP Inc.	No ROA	-	2026-10-12
192.56.172.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.175.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.184.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.185.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.190.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.192.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.193.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.200.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.201.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.202.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.203.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.204.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.205.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.206.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.207.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.224.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.225.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.226.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.228.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.229.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.230.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.231.0/24	AS14381 CATERPILLAR-INC - Caterpillar, Inc.	No ROA	-	2026-10-12
192.56.233.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.234.0/24	AS35549 METRONET-AS A1 Hrvatska d.o.o.	No ROA	-	2026-10-12
192.56.235.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.236.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.238.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.239.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.240.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.241.0/24	AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC	No ROA	-	2026-10-12
192.56.242.0/24	AS2154 HPINC - HP Inc.	No ROA	-	2026-10-12
192.56.244.0/24	AS7122 MTS-ASN - Bell Canada	No ROA	-	2026-10-12
192.56.246.0/23	AS10430 WA-K20 - Washington State K-20 Telecommunications Network	No ROA	-	2026-10-12
192.56.248.0/21	AS10430 WA-K20 - Washington State K-20 Telecommunications Network	No ROA	-	2026-10-12
192.56.248.0/22	AS10430 WA-K20 - Washington State K-20 Telecommunications Network	No ROA	-	2026-10-12
192.56.252.0/23	AS10430 WA-K20 - Washington State K-20 Telecommunications Network	No ROA	-	2026-10-12

Transfer History

Registry transfers of 192.56.128.0/17, blocks inside it, or blocks containing it.

192.56.128.0/17M&A · 2022-04-04
Hewlett-Packard Company
🇺🇸 US ARIN
→
HP Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2022-04-04	192.56.128.0/17	Hewlett-Packard Company 🇺🇸 US ARIN	HP Inc. 🇺🇸 US ARIN	M&A

Geolocation

Country🇯🇵JapanJP

RegionTokyo

CityChiyoda City

Coordinates35.6940, 139.7540 ↗

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/192.56.128.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/192.56.128.0/17" | jq

External Links

RIPEstat