These blocks are registered to Amazon Data Services Ireland Ltd but cryptographically authorized across 6 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.

2001:4d78:513::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2001:4d78:2007::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2001:4d78:2307::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2a01:878:3100::/48 /48	authorized for AS12302 — Vodafone Romania S.A.
2001:4d78:12f::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2001:4d78:20d::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2001:4d78:20e::/48 /48	authorized for AS15830 — Equinix (EMEA) Acquisition Enterprises B.V.
2a00:2381:f7cd:1100::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:f7cd:1300::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:f7cd:1a00::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:f7cd:3f00::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:f7cd:4500::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:f7cd:5300::/56 /56	authorized for AS2856 — British Telecommunications PLC
2a00:2381:a66:a00::/56 /56	authorized for AS2856 — British Telecommunications PLC
2001:7e8:8005:300::/56 /56	authorized for AS6661 — POST Luxembourg

AA1441-AP AA1445-AP AANO1-ARIN AARP1-AP AARP1-AP ABOVENET-MNT ADSB-3 ADSF ADSI-21 ADSI-22 ADSJ1-AP ADSJ1-AP +58 more