Autonomous System

AS27506 Zayo Bandwidth

ISPActiveUnited StatesARIN

AS27506 (CROWNCASTLE-AS27506) is an ISP network operated by Zayo Bandwidth in United States, registered with ARIN. It has 17 IPv4 prefixes with 51,200 addresses, which makes it the 4,282nd largest of 82,283 active autonomous systems by IPv4 space.

IPv4 addresses51,200in 17 prefixes
IPv6 prefixes0none
Size rank#4,282of 82,283 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationZayo Bandwidth
AS nameCROWNCASTLE-AS27506
Websitezayo.com
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactabuse@zayo.com
Registered2003-03-19
Last updated2026-06-01

IPv4 prefixes

17 prefixes · 51,200 addresses
NetworkAddressesFirst – last address
64.20.160.0/198,19264.20.160.0 – 64.20.191.255
69.64.192.0/198,19269.64.192.0 – 69.64.223.255
209.148.32.0/198,192209.148.32.0 – 209.148.63.255
64.20.160.0/204,09664.20.160.0 – 64.20.175.255
64.20.176.0/204,09664.20.176.0 – 64.20.191.255
69.64.192.0/204,09669.64.192.0 – 69.64.207.255
76.8.64.0/204,09676.8.64.0 – 76.8.79.255
209.148.32.0/204,096209.148.32.0 – 209.148.47.255
209.148.48.0/204,096209.148.48.0 – 209.148.63.255
64.20.168.0/2425664.20.168.0 – 64.20.168.255
64.20.175.0/2425664.20.175.0 – 64.20.175.255
64.20.177.0/2425664.20.177.0 – 64.20.177.255
64.20.178.0/2425664.20.178.0 – 64.20.178.255
64.20.179.0/2425664.20.179.0 – 64.20.179.255
64.20.180.0/2425664.20.180.0 – 64.20.180.255
64.20.186.0/2425664.20.186.0 – 64.20.186.255
64.20.187.0/2425664.20.187.0 – 64.20.187.255

IPv6 prefixes

No IPv6 prefixes.

Query AS27506 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS27506&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS27506, with or without a key:

curl "https://api.ipapi.is/?q=64.20.160.1"

Other networks of Zayo Bandwidth

6 of 11
AS6461 Zayo Bandwidth1,756,160 IPv4 addressesAS46887 Zayo Bandwidth1,347,072 IPv4 addressesAS11686 Zayo Bandwidth965,376 IPv4 addressesAS33132 Zayo Bandwidth140,032 IPv4 addressesAS19092 Zayo Bandwidth93,696 IPv4 addressesAS32703 Zayo Bandwidth67,840 IPv4 addresses

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