Home Prefix Lookup171.72.0.0/16

171.72.0.0/16 - BGP Prefix

IPv4ARINallocatedNo ROA

CIDR

171.72.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇺🇸 United States

City

San Francisco (Financial District)

RIR

ARIN

Status

allocated

Allocated

1997-09-19

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

36 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
171.72.192.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.193.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.194.0/24	AS10837 WELLSFARGO-10837 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.195.0/24	AS10837 WELLSFARGO-10837 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.196.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.197.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.198.0/24	AS10837 WELLSFARGO-10837 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.199.0/24	AS10837 WELLSFARGO-10837 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.202.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.203.0/24	AS4196 WELLSFARGO-4196 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.208.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.209.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.211.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.212.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.213.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.215.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.216.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.218.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.219.0/24	AS4243 WELLSFARGO-4243 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.221.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.222.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.224.0/24	AS10372 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.225.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.226.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.227.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.228.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.229.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.230.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.231.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.232.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.233.0/24	AS2011 WELLSFARGO-2011 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.234.0/24	AS2011 WELLSFARGO-2011 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.236.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.237.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.238.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11
171.72.239.0/24	AS10376 WELLSFARGO-10372-10376 - Wells Fargo Bank, N.A.	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4196	Other IRR	MAINT-AS32787	2023-11-13
AS4243	Other IRR	MAINT-AS32787	2023-11-13
AS10837	Other IRR	MAINT-AS32787	2023-11-13

Transfer History

Registry transfers of 171.72.0.0/16, blocks inside it, or blocks containing it.

171.72.0.0/16M&A · 2025-11-04
Wells Fargo & Company
🇺🇸 US ARIN
→
Wells Fargo Bank, N.A.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-11-04	171.72.0.0/16	Wells Fargo & Company 🇺🇸 US ARIN	Wells Fargo Bank, N.A. 🇺🇸 US ARIN	M&A

Geolocation

Country🇺🇸United StatesUS

RegionCalifornia

CitySan Francisco (Financial District)

Coordinates37.7933, -122.4030 ↗

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/171.72.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/171.72.0.0/16" | jq

External Links

RIPEstat