AS11971 is the autonomous system of Pfizer Inc.. It holds 55,296 IPv4 addresses in 15 prefixes, mainly in 
United States.
By IPv4 addresses the network ranks #3,768 worldwide and #1,423 of 18,202 networks in United States.
The largest block is 148.168.128.0 to 148.168.215.255 with 22,528 addresses, geolocated to New York.
- IPv4 addresses
- 55,296
- IPv4 prefixes
- 15
- World rank
- #3,768
Addresses by country
- United States 100%
Largest blocks
- 148.168.128.0 New York22,528
- 148.168.0.0 New York16,384
- 148.168.218.0 New York9,728
- 148.168.84.0 New York3,072
- 148.168.65.0 New York2,816
- 148.168.78.0 New York512
- 146.240.1.0 New York256
Networks of similar size
55,296
55,040IPv4 prefixes
Questions and answers
Who owns AS11971?
Autonomous system AS11971 is operated by Pfizer Inc..
How many IP addresses does AS11971 have?
The network holds 55,296 IPv4 addresses in 15 prefixes.
Which country is AS11971 in?
The main country is United States.
How big is AS11971?
By IPv4 addresses it ranks #3,768 worldwide.
What is the largest address block of AS11971?
148.168.128.0 to 148.168.215.255, 22,528 addresses.