WINDSTREAM HOLDINGS, INC.

These blocks are registered to Windstream Communications LLC but cryptographically authorized across 16 different networks — typical for a large wholesale or transit carrier whose address space is substantially re-announced by downstream customers under their own ASNs, not individually noteworthy.

2607:340::/28 /28	authorized for AS7018 — AT&T Enterprises, LLC
2601:20b8::/29 /29	authorized for AS10111 — Zeofast Network
2601:20d0::/29 /29	authorized for AS10111 — Zeofast Network
2607:d740::/32 /32	authorized for AS6939 — Hurricane Electric LLC
209.20.192.0/18 /18	authorized for AS1239 — Cogent Communications, LLC
151.145.160.0/19 /19	authorized for AS6079 — RCN
109.121.0.0/19 /19	authorized for AS1239 — Cogent Communications, LLC
128.121.64.0/19 /19	authorized for AS1299 — Arelion Sweden AB
128.121.96.0/19 /19	authorized for AS1299 — Arelion Sweden AB
131.103.224.0/19 /19	authorized for AS1299 — Arelion Sweden AB
137.155.0.0/19 /19	authorized for AS174 — Cogent Communications, LLC
139.190.192.0/19 /19	authorized for AS6079 — RCN
151.145.160.0/19 /19	authorized for AS6079 — RCN
161.8.160.0/19 /19	authorized for AS5650 — Frontier Communications of America, Inc.
192.204.192.0/19 /19	authorized for AS1299 — Arelion Sweden AB

A2-MNT ABUSE9297-ARIN AFRINIC-HM-MNT AM-VDS AOEL1-AP AR834 AS1020-MNT AS329324 AS7029 AT1513-AP BLATC4-ARIN BLATC4-ARIN +60 more