Zayo Group IP Ranges
Zayo Group is an internet backbone and transit provider operating AS6461. Its customer cone reaches 20,242 networks, which is why its routers appear frequently in traceroutes.
- Provider
- Zayo Group
- Primary ASN
- AS6461
- Category
- Transit
- Headquarters
- Boulder, CO, USA
- Announced IPv4 prefixes
- 215
- Registry
- ARIN
Known IP ranges
These prefixes are currently announced to the global routing table by AS6461 (ZAYO-6461 - Zayo Bandwidth). Prefix sets change over time - use WHOIS Lookup for the authoritative record on any specific address.
208.184.0.0/15
159.18.0.0/16
144.83.0.0/16
216.13.0.0/16
66.46.0.0/16
64.125.0.0/16
209.249.0.0/16
216.191.0.0/16
167.217.0.0/16
128.177.0.0/16
2a00:16f8::/32
2001:438::/32
2604:e500::/32 (IPv6)
What does a Zayo Group IP mean in a privacy test?
A Zayo Group hop in a traceroute is normal and simply means your path crosses their backbone. An address directly on AS6461 usually belongs to a server or network buying transit from them.
Related tools
Frequently asked questions
What IP ranges does Zayo Group use?
Zayo Group announces 215 IPv4 prefixes and 13 IPv6 prefixes under AS6461. Larger blocks include 208.184.0.0/15, 159.18.0.0/16, 144.83.0.0/16. The full current list is published by ARIN, and prefixes change as the network grows.
Why does a Zayo Group IP appear in my privacy test?
A Zayo Group hop in a traceroute is normal and simply means your path crosses their backbone. An address directly on AS6461 usually belongs to a server or network buying transit from them.
How large is the Zayo Group network?
By CAIDA's AS Rank, AS6461 reaches 20,242 networks through its customer cone, covering roughly 512.9 million IPv4 addresses. That places it at global rank 8 among all autonomous systems.
How do I look up a Zayo Group IP address?
Enter the address in the MyIPScan IP Geolocation Lookup. Addresses in this network return AS6461 (ZAYO-6461 - Zayo Bandwidth). WHOIS Lookup shows the registered CIDR block for any specific address.
What ASN does Zayo Group use?
Zayo Group operates AS6461, registered with ARIN and held by ZAYO-6461 - Zayo Bandwidth. In a privacy test this ASN is what identifies traffic as belonging to their network.