| 2001:4a00::/23 | WHOIS (RIPE_NCC) | RIPE Network Coordination Center | EU |
| 2001:4a80::/25 | RIPE_NCC reserved | — | ZZ |
| 2001:4a40::/26 | RIPE_NCC reserved | — | ZZ |
| 2001:4a00::/27 | BGP route | AS13285 TalkTalk Communications Limited | — |
| 2001:4a00::/27 | WHOIS (RIPE_NCC) | TalkTalk Communications Limited | GB |
| 2001:4a00::/27 | RIPE_NCC assigned | — | GB |
| 2001:4a20::/27 | RIPE_NCC reserved | — | ZZ |
| 2001:4b00::/29 | BGP route | AS12620 Ticinocom SA | — |
| 2001:4b00::/29 | WHOIS (RIPE_NCC) | Ticinocom SA | CH |
| 2001:4b00::/29 | RIPE_NCC assigned | — | CH |
| 2001:4b10::/29 | WHOIS (RIPE_NCC) | Bogons Ltd | GB |
| 2001:4b10::/29 | RIPE_NCC assigned | — | GB |
| 2001:4b20::/29 | BGP route | AS34288 Kantonsschule Zug | — |
| 2001:4b20::/29 | WHOIS (RIPE_NCC) | Kantonsschule Zug | CH |
| 2001:4b20::/29 | RIPE_NCC assigned | — | CH |
| 2001:4b28::/29 | BGP route | AS6775 Andreas Fink | — |
| 2001:4b28::/29 | WHOIS (RIPE_NCC) | Andreas Fink | AD |
| 2001:4b28::/29 | RIPE_NCC assigned | — | CH |
| 2001:4b30::/29 | BGP route | AS9036 Neuronnexion SCOP | — |
| 2001:4b30::/29 | WHOIS (RIPE_NCC) | Neuronnexion SCOP | FR |
| 2001:4b30::/29 | RIPE_NCC assigned | — | FR |
| 2001:4b38::/29 | WHOIS (RIPE_NCC) | equada network GmbH | DE |
| 2001:4b38::/29 | RIPE_NCC assigned | — | DE |
| 2001:4b48::/29 | RIPE_NCC reserved | — | ZZ |
| 2001:4b50::/29 | WHOIS (RIPE_NCC) | EUROCONTROL, the European Organisation for the Safety of Air Navigation | BE |
| 2001:4b50::/29 | RIPE_NCC assigned | — | BE |
| 2001:4b68::/29 | WHOIS (RIPE_NCC) | Hutchison Drei Austria GmbH | AT |
| 2001:4b68::/29 | RIPE_NCC assigned | — | AT |
| 2001:4b70::/29 | WHOIS (RIPE_NCC) | UniCredit S.p.A. | IT |
| 2001:4b70::/29 | RIPE_NCC assigned | — | IT |
| 2001:4b78::/29 | BGP route | AS12637 SEEWEB s.r.l. | — |
| 2001:4b78::/29 | WHOIS (RIPE_NCC) | SEEWEB s.r.l. | IT |
| 2001:4b78::/29 | RIPE_NCC assigned | — | IT |
| 2001:4b80::/29 | BGP route | AS206557 Eltele AS | — |
| 2001:4b80::/29 | WHOIS (RIPE_NCC) | Eltele AS | NO |
| 2001:4b80::/29 | RIPE_NCC assigned | — | NO |
| 2001:4b98::/29 | WHOIS (RIPE_NCC) | GANDI SAS | FR |
| 2001:4b98::/29 | RIPE_NCC assigned | — | FR |
| 2001:4ba0::/29 | WHOIS (RIPE_NCC) | WIIT AG | DE |
| 2001:4ba0::/29 | RIPE_NCC assigned | — | DE |
| 2001:4ba8::/29 | BGP route | AS12570 O2 Czech Republic, a.s. | — |
| 2001:4ba8::/29 | WHOIS (RIPE_NCC) | O2 Czech Republic, a.s. | CZ |
| 2001:4ba8::/29 | RIPE_NCC assigned | — | CZ |
| 2001:4bb8::/29 | BGP route | AS8447 A1 Telekom Austria AG | — |
| 2001:4bb8::/29 | WHOIS (RIPE_NCC) | A1 Telekom Austria AG | AT |
| 2001:4bb8::/29 | RIPE_NCC assigned | — | AT |
| 2001:4bc0::/29 | RIPE_NCC available | — | ZZ |
| 2001:4bc8::/29 | BGP route | AS8412 T-Mobile Austria GmbH | — |
| 2001:4bc8::/29 | WHOIS (RIPE_NCC) | T-Mobile Austria GmbH | AT |
| 2001:4bc8::/29 | RIPE_NCC assigned | — | AT |
| 2001:4bd8::/29 | BGP route | AS15725 IKS Service GmbH | — |
| 2001:4bd8::/29 | WHOIS (RIPE_NCC) | IKS Service GmbH | DE |
| 2001:4bd8::/29 | RIPE_NCC assigned | — | DE |
| 2001:4b0c::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b1c::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b5c::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b6c::/30 | BGP route | AS12635 Hutchison Drei Austria GmbH | — |
| 2001:4b8c::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b44::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b64::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b94::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4bb4::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4bd4::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4be4::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4bec::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4bf4::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4bfc::/30 | RIPE_NCC reserved | — | ZZ |
| 2001:4b0a::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b1a::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b5a::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b8a::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b42::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b62::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b92::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4bb2::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4bd2::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4be2::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4bea::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4bf2::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4bfa::/31 | RIPE_NCC reserved | — | ZZ |
| 2001:4b3a::/32 | BGP route | AS25220 equada network GmbH | — |
| 2001:4b3b::/32 | BGP route | AS25220 equada network GmbH | — |
| 2001:4b3b::/32 | WHOIS (RIPE_NCC) | OpenNumbers GmbH | DE |
| 2001:4b08::/32 | BGP route | AS29452 Secura Hosting Ltd | — |
| 2001:4b08::/32 | WHOIS (RIPE_NCC) | Secura Hosting Ltd | GB |
| 2001:4b08::/32 | RIPE_NCC assigned | — | GB |
| 2001:4b10::/32 | BGP route | AS3213 Bogons Ltd | — |
| 2001:4b18::/32 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b18::/32 | WHOIS (RIPE_NCC) | Telecom Italia S.p.A. | IT |
| 2001:4b28::/32 | BGP route | AS6775 Andreas Fink | — |
| 2001:4b38::/32 | BGP route | AS25220 equada network GmbH | — |
| 2001:4b39::/32 | BGP route | AS25220 equada network GmbH | — |
| 2001:4b40::/32 | WHOIS (RIPE_NCC) | Erste Digital GmbH | AT |
| 2001:4b58::/32 | BGP route | AS6802 Bulgarian Research and Education Network Association (BREN) | — |
| 2001:4b58::/32 | WHOIS (RIPE_NCC) | Bulgarian Research and Education Network Association (BREN) | BG |
| 2001:4b60::/32 | BGP route | AS28857 DXC Technology Austria GmbH | — |
| 2001:4b60::/32 | WHOIS (RIPE_NCC) | DXC Technology Austria GmbH | AT |
| 2001:4b69::/32 | BGP route | AS12635 Hutchison Drei Austria GmbH | — |
| 2001:4b78::/32 | BGP route | AS12637 SEEWEB s.r.l. | — |
| 2001:4b88::/32 | BGP route | AS20640 Titan Networks Internet & Telecommunications Service Providing GmbH | — |
| 2001:4b88::/32 | WHOIS (RIPE_NCC) | Titan Networks Internet & Telecommunications Service Providing GmbH | DE |
| 2001:4b90::/32 | WHOIS (RIPE_NCC) | Odigo SASU | FR |
| 2001:4b98::/32 | BGP route | AS29169 GANDI SAS | — |
| 2001:4ba0::/32 | BGP route | AS24961 WIIT AG | — |
| 2001:4ba1::/32 | BGP route | AS24961 WIIT AG | — |
| 2001:4ba2::/32 | BGP route | AS39519 WIIT AG | — |
| 2001:4ba2::/32 | WHOIS (RIPE_NCC) | myLoc managed IT AG - Enterprise and Dialup customers | DE |
| 2001:4ba3::/32 | BGP route | AS24961 WIIT AG | — |
| 2001:4ba3::/32 | WHOIS (RIPE_NCC) | MYLOC-MIL | IT |
| 2001:4ba4::/32 | BGP route | AS24961 WIIT AG | — |
| 2001:4ba4::/32 | WHOIS (RIPE_NCC) | MYLOC-MUC | DE |
| 2001:4ba6::/32 | BGP route | AS24961 WIIT AG | — |
| 2001:4bb0::/32 | BGP route | AS41497 INTRED S.p.A. | — |
| 2001:4bb0::/32 | WHOIS (RIPE_NCC) | INTRED S.p.A. | IT |
| 2001:4bd0::/32 | WHOIS (RIPE_NCC) | Burstfire Networks Ltd | GB |
| 2001:4be0::/32 | WHOIS (RIPE_NCC) | Mobil-group ltd | RU |
| 2001:4be8::/32 | BGP route | AS31595 Rocket Fibre Ltd | — |
| 2001:4be8::/32 | WHOIS (RIPE_NCC) | Rocket Fibre Ltd | GB |
| 2001:4bf0::/32 | WHOIS (RIPE_NCC) | Astutium Limited | GB |
| 2001:4bf8::/32 | BGP route | AS8271 Internet Business Solutions AG | — |
| 2001:4bf8::/32 | WHOIS (RIPE_NCC) | Internet Business Solutions AG | CH |
| 2001:4b88:4000::/34 | WHOIS (RIPE_NCC) | -- Carrier Services -- | CH |
| 2001:4b7a::/36 | WHOIS (RIPE_NCC) | Seeweb Hosting Company | IT |
| 2001:4b7a:2000::/36 | WHOIS (RIPE_NCC) | Seeweb Cloud Servers customers | IT |
| 2001:4b7a:a000::/36 | WHOIS (RIPE_NCC) | Seeweb colocation customers | IT |
| 2001:4b7e::/36 | WHOIS (RIPE_NCC) | Seeweb Hosting Company | IT |
| 2001:4b7e:2000::/36 | WHOIS (RIPE_NCC) | Seeweb Cloud Servers customers | IT |
| 2001:4b7e:a000::/36 | WHOIS (RIPE_NCC) | Seeweb colocation customers | IT |
| 2001:4b18:1000::/36 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b18:2000::/36 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b18:3000::/36 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b18:a000::/36 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b18:b000::/36 | BGP route | AS20746 Telecom Italia S.p.A. | — |
| 2001:4b20:2000::/36 | WHOIS (RIPE_NCC) | AS34288-IPV6-RANGE-SCHOOLS | CH |
| 2001:4b28:600::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_ZW | ZW |
| 2001:4b28:700::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_ZM | ZM |
| 2001:4b28:800::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_ZA | ZA |
| 2001:4b28:900::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_YT | YT |
| 2001:4b28:a00::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_YE | YE |
| 2001:4b28:b00::/40 | WHOIS (RIPE_NCC) | FTS_MOBILE_WS | WS |
| 2001:4b58:8::/48 | BGP route | AS6802 Bulgarian Research and Education Network Association (BREN) | — |
| 2001:4b58:22::/48 | BGP route | AS6802 Bulgarian Research and Education Network Association (BREN) | — |
| 2001:4b58:37::/48 | BGP route | AS6802 Bulgarian Research and Education Network Association (BREN) | — |
| 2001:4b58:38::/48 | BGP route | AS6802 Bulgarian Research and Education Network Association (BREN) | — |
| 2001:4b60:100::/48 | BGP route | AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | — |
| 2001:4b98:aaaa::/48 | BGP route | AS209453 GANDI SAS | — |
| 2001:4b98:aaab::/48 | BGP route | AS209453 GANDI SAS | — |
| 2001:4b98:dc5::/48 | BGP route | AS203476 GANDI SAS | — |
| 2001:4b98:dc6::/48 | BGP route | AS203476 GANDI SAS | — |
| 2001:4b98:e01::/48 | BGP route | AS29169 GANDI SAS | — |