ZAYO GROUP HOLDINGS, INC.
Zayo Bandwidth
GLEIF verified
LEI
529900Z6OTS7RT0V0I47
Registered name
ZAYO GROUP HOLDINGS, INC.
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 2,092 · 6,049,719 IPv4 addresses |
| Registered in | United States (1,598) · Canada (44) · United Kingdom (24) · Germany (10) · Netherlands (10) · Hong Kong (8) |
| All fragments | 2,336 blocks across 87 clusters |
| Cluster ID | 208783476 |
| Registry | APNIC |
| Owner jurisdiction | US-DE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 529900Z6OTS7RT0V0I47 |
| Shared handles | clustered on 68 shared RIR contact/maintainer handles |
| Registry names | 13 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
2,041
+1,132 netblocks since 2026-07-05
2026-07-05
peak 2,041
2026-07-19
IP Ranges (2,092)
showing 50 of 2,092 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 5.57.80.201/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 8.3.234.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.41.192.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.41.196.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.41.205.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.41.206.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.41.207.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 8.225.194.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 23.247.180.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 27.111.230.52/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 36.255.57.55/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 37.49.232.62/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 37.49.237.180/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 38.29.170.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.82.195.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.82.200.0/22 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.82.202.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.82.203.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.91.120.0/21 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.91.122.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.107.160.0/22 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.107.162.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.72.0/22 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.72.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.73.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.76.0/22 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.78.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 38.128.79.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 45.42.56.0/21 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 45.73.144.0/20 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 45.73.155.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 45.73.156.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 45.127.173.4/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 62.69.146.139/32 | Zayo | PEERINGDB | ASSIGNED | ● high |
| 64.20.96.0/19 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.160.0/19 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.160.0/20 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.168.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.175.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.176.0/20 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.177.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.178.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.179.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.180.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.186.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.20.187.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.95.166.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.124.13.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.124.47.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
| 64.124.84.0/24 | Zayo Bandwidth | BGP | ANNOUNCED | ● high |
Domains hosted in this network
what's this?Customer-delegated space
how is this classified?
Unclassified
1,964 (93.9%)
Operator infrastructure (named)
102 (4.9%)
Customer access pools
26 (1.2%)
Network trust
what's this?
RPKI hygiene: D
how networks compare →
22.4%
of checked blocks have valid RPKI ROA coverage
(449 of 2,000, sampled from 2,092)
Possible discrepancies (3)
These blocks are registered to Zayo Bandwidth but cryptographically authorized for a different, unrelated network (3 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2a0b:7ec0::/29 /29 | authorized for AS206728 — Media Land LLC |
| 206.254.231.0/24 /24 | authorized for AS3354 — University of Texas System |
| 208.187.29.0/24 /24 | authorized for AS7385 — Allstream Business US, LLC |
NIC Handles
ABOVENET-MNT
ABUSE5675-ARIN
AG890-AP
AH1063-AP
AS11074
AS11079
AS11359
AS11686
AS13555
AS13592
AS15290
AS16503
+56 more