AS27506 Crown Castle Fiber LLC

United States CROWNCASTLE-AS27506 ARIN 17 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

28,672

IPv6 /48 networks

RPKI

0 valid17 no ROA

Peers and downstreams

Holder

AS name: CROWNCASTLE-AS27506
Description: Crown Castle Fiber LLC
Organisation: Crown Castle Fiber LLC
Abuse contact: Not published
Assigned: 2003-03-18
Registered: 2003-03-19
Record last changed: 2026-06-01 16:06 UTC

209.148.32.0/19 209.148.32.0/20 209.148.48.0/20 64.20.160.0/19 64.20.160.0/20 64.20.168.0/24 64.20.175.0/24 64.20.176.0/20 64.20.177.0/24 64.20.178.0/24 64.20.179.0/24 64.20.180.0/24 64.20.186.0/24 64.20.187.0/24 69.64.192.0/19 69.64.192.0/20 76.8.64.0/20

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 45/100

fail	Prefixes covered by valid ROAs 0 of 17 announced prefixes are RPKI valid, 17 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
fail	Announces IPv6 No IPv6 prefixes are announced.	0/15
partly	More than one upstream 1 upstream seen in BGP.	5/10
pass	Working abuse contact abuse@zayo.com is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-06-01.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/27506"><img src="https://ip-fd.net/badge/asn/27506/health.svg" alt="AS27506 network health on IP-FD.net"></a>

Markdown

[![AS27506 network health](https://ip-fd.net/badge/asn/27506/health.svg)](https://ip-fd.net/asn/27506)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS27506
as-name:        ZAYO-CCF-AS27506
handle:         AS27506
registrant:     ZAYOB (Zayo Bandwidth)
technical,administrative,noc:ZIE-ARIN (Zayo IP Engineering) <ipeng@zayo.com>
abuse:          ABUSE5675-ARIN (Abuse) <abuse@zayo.com>
last changed:   2026-06-01T12:06:28-04:00
registration:   2003-03-19T18:02:30-05:00
source:         ARIN (RDAP)

Routing data

Updated just now

Registry record

Fetched just now from ARIN RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/27506

const res = await fetch('https://ip-fd.net/api/v1/asn/27506', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/27506', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/27506');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/27506", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

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