Home Prefix Lookup173.237.0.0/18

173.237.0.0/18 - Servers.Com (AS7979)

IPv4ARINallocatedAS7979SERVERS-COM - Servers.com, Inc.No ROA

CIDR

173.237.0.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇺🇸 United States

City

Chicago

RIR

ARIN

Status

allocated

Allocated

2015-06-04

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

60 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
173.237.0.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.1.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.3.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.5.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.6.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.7.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.8.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.9.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.10.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.11.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.12.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.13.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.14.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.15.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.16.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.17.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.18.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.19.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.20.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.21.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.22.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.23.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.24.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.25.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.26.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.27.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.28.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.29.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.30.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.31.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.32.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.33.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.35.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.37.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.38.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.39.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.40.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.41.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.42.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.43.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.44.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.45.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.46.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.47.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.48.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.49.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.50.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.51.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.52.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.53.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.54.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.55.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.56.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.57.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.58.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.59.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.60.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.61.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.62.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11
173.237.63.0/24	AS7979 SERVERS-COM - Servers.com, Inc.	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS7979	Other IRR	MAINT-AS46786	2025-05-30

Transfer History

Registry transfers of 173.237.0.0/18, blocks inside it, or blocks containing it.

173.237.0.0/18Transfer · 2015-06-04
NephoScale Inc.
🇺🇸 US ARIN
→
Servers.com, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2015-06-04	173.237.0.0/18	NephoScale Inc. 🇺🇸 US ARIN	Servers.com, Inc. 🇺🇸 US ARIN	Transfer

Origin ASN

AS7979

SERVERS-COM - Servers.com, Inc.

Related Prefixes

More prefixes of AS7979

All prefixes of AS7979 →

Geolocation

Country🇺🇸United StatesUS

RegionIllinois

CityChicago

Coordinates41.8781, -87.6298 ↗

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/173.237.0.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/173.237.0.0/18" | jq

External Links

RIPEstat