Home Prefix Lookup163.253.0.0/16

163.253.0.0/16 - BGP Prefix

IPv4ARINallocated RPKI Valid

CIDR

163.253.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇺🇸 United States

City

Ann Arbor (King)

RIR

ARIN

Status

allocated

Allocated

1992-10-21

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

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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

62 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
163.253.0.0/22	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.0.0/23	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Invalid	-	2026-10-11
163.253.0.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.2.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Invalid	-	2026-10-11
163.253.3.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.9.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.12.0/23	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.14.0/23	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.16.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.16.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.16.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.17.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.17.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.17.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.18.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.19.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.19.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.23.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.23.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.23.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.26.0/23	AS62775 INTERNET2-ISS - Internet2	Valid	-	2026-10-11
163.253.28.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.29.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.30.0/24	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	-	2026-10-11
163.253.30.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.31.0/24	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	-	2026-10-11
163.253.31.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.32.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.34.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.36.0/22	AS237 MERIT-AS-14 - Merit Network Inc.	Valid	-	2026-10-11
163.253.40.0/23	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.44.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.46.0/24	AS14618 AMAZON-AES - Amazon.com, Inc.	Valid	-	2026-10-11
163.253.47.0/24	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	-	2026-10-11
163.253.56.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.57.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.59.0/24	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	-	2026-10-11
163.253.59.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.60.0/23	AS62775 INTERNET2-ISS - Internet2	Valid	-	2026-10-11
163.253.63.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.63.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.64.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.64.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.66.0/23	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.67.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.68.0/23	AS62775 INTERNET2-ISS - Internet2	Valid	-	2026-10-11
163.253.70.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.71.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.72.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.73.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.74.0/24	AS396961 INTERNET2-OSG - Internet2	Valid	-	2026-10-11
163.253.76.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.77.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.77.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.78.0/23	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.79.0/24	AS396955 INTERNET2-BLEND - Internet2	Valid	-	2026-10-11
163.253.80.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.80.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.81.0/24	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.81.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11
163.253.82.0/23	AS11164 INTERNET2-I2PX - Internet2	Valid	-	2026-10-11
163.253.83.0/24	AS11537 INTERNET2-RESEARCH-EDU - Internet2	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
163.253.0.0/16	AS11537	/16	arin

Transfer History

Registry transfers of 163.253.0.0/16, blocks inside it, or blocks containing it.

163.253.0.0/16M&A · 2017-02-03
EDUCAUSE
🇺🇸 US ARIN
→
Internet2
🇺🇸 US ARIN

Date	Resource	From	To	Type
2017-02-03	163.253.0.0/16	EDUCAUSE 🇺🇸 US ARIN	Internet2 🇺🇸 US ARIN	M&A

Geolocation

Country🇺🇸United StatesUS

RegionMichigan

CityAnn Arbor (King)

Coordinates42.3006, -83.6914 ↗

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/163.253.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/163.253.0.0/16" | jq

External Links

RIPEstat