AS21965 is the autonomous system of Highmark Inc. It holds 5,632 IPv4 addresses in 16 prefixes, mainly in 
United States.
By IPv4 addresses the network ranks #12,938 worldwide and #3,944 of 18,202 networks in United States.
The largest block is 167.164.3.0 to 167.164.8.255 with 1,536 addresses, geolocated to Washington D.C..
- IPv4 addresses
- 5,632
- IPv4 prefixes
- 16
- World rank
- #12,938
Addresses by country
- United States 100%
Largest blocks
- 167.164.3.0 Washington D.C.1,536
- 157.154.3.0 Philadelphia1,536
- 199.190.163.0 Pittsburgh (Downtown)512
- 199.190.160.0 Sterling256
- 192.152.123.0 Pittsburgh (Downtown)256
- 167.164.20.0 Washington D.C.256
- 167.164.14.0 Washington D.C.256
- 167.164.11.0 Washington D.C.256
Networks of similar size
5,632
5,632IPv4 prefixes
Questions and answers
Who owns AS21965?
Autonomous system AS21965 is operated by Highmark Inc.
How many IP addresses does AS21965 have?
The network holds 5,632 IPv4 addresses in 16 prefixes.
Which country is AS21965 in?
The main country is United States.
How big is AS21965?
By IPv4 addresses it ranks #12,938 worldwide.
What is the largest address block of AS21965?
167.164.3.0 to 167.164.8.255, 1,536 addresses.