| 2001:400::/23 | WHOIS (ARIN) | American Registry for Internet Numbers | US |
| 2001:503:1000::/36 | ARIN available | β | ZZ |
| 2001:503::/37 | ARIN available | β | ZZ |
| 2001:503:2800::/37 | ARIN available | β | ZZ |
| 2001:503:4000::/37 | ARIN available | β | ZZ |
| 2001:503:6000::/37 | ARIN available | β | ZZ |
| 2001:503:7000::/37 | ARIN available | β | ZZ |
| 2001:503:8800::/37 | ARIN available | β | ZZ |
| 2001:503:9800::/37 | ARIN available | β | ZZ |
| 2001:503:b000::/37 | ARIN available | β | ZZ |
| 2001:503:d800::/37 | ARIN available | β | ZZ |
| 2001:503:3c00::/38 | ARIN available | β | ZZ |
| 2001:503:4c00::/38 | ARIN available | β | ZZ |
| 2001:503:5c00::/38 | ARIN available | β | ZZ |
| 2001:503:6c00::/38 | ARIN available | β | ZZ |
| 2001:503:7c00::/38 | ARIN available | β | ZZ |
| 2001:503:800::/38 | ARIN available | β | ZZ |
| 2001:503:2400::/38 | ARIN available | β | ZZ |
| 2001:503:3400::/38 | ARIN available | β | ZZ |
| 2001:503:5000::/38 | ARIN available | β | ZZ |
| 2001:503:8400::/38 | ARIN available | β | ZZ |
| 2001:503:9400::/38 | ARIN available | β | ZZ |
| 2001:503:a400::/38 | ARIN available | β | ZZ |
| 2001:503:ac00::/38 | ARIN available | β | ZZ |
| 2001:503:c000::/38 | ARIN available | β | ZZ |
| 2001:503:c800::/38 | ARIN available | β | ZZ |
| 2001:503:e400::/38 | ARIN available | β | ZZ |
| 2001:503:f400::/38 | ARIN available | β | ZZ |
| 2001:503:f800::/38 | ARIN available | β | ZZ |
| 2001:503:3a00::/39 | ARIN available | β | ZZ |
| 2001:503:4a00::/39 | ARIN available | β | ZZ |
| 2001:503:6a00::/39 | ARIN available | β | ZZ |
| 2001:503:2000::/39 | ARIN available | β | ZZ |
| 2001:503:3000::/39 | ARIN available | β | ZZ |
| 2001:503:5600::/39 | ARIN available | β | ZZ |
| 2001:503:5800::/39 | ARIN available | β | ZZ |
| 2001:503:7800::/39 | ARIN available | β | ZZ |
| 2001:503:9200::/39 | ARIN available | β | ZZ |
| 2001:503:a200::/39 | ARIN available | β | ZZ |
| 2001:503:aa00::/39 | ARIN available | β | ZZ |
| 2001:503:b800::/39 | ARIN available | β | ZZ |
| 2001:503:bc00::/39 | ARIN available | β | ZZ |
| 2001:503:c400::/39 | ARIN available | β | ZZ |
| 2001:503:ce00::/39 | ARIN available | β | ZZ |
| 2001:503:d200::/39 | ARIN available | β | ZZ |
| 2001:503:d600::/39 | ARIN available | β | ZZ |
| 2001:503:e00::/39 | ARIN available | β | ZZ |
| 2001:503:e000::/39 | ARIN available | β | ZZ |
| 2001:503:ea00::/39 | ARIN available | β | ZZ |
| 2001:503:ec00::/39 | ARIN available | β | ZZ |
| 2001:503:fc00::/39 | ARIN available | β | ZZ |
| 2001:503:5ae2::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:5ae2::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:7bbb::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:7bbf::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:7bbf::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:39c1::/48 | BGP route | AS36631 VeriSign Global Registry Services | β |
| 2001:503:39c1::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:83eb::/48 | BGP route | AS36629 VeriSign Global Registry Services | β |
| 2001:503:83eb::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:91ef::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:91ef::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:231d::/48 | BGP route | AS396583 VeriSign Global Registry Services | β |
| 2001:503:231d::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:3227::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:3227::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:4872::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:4872::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:5419::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:5419::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:6810::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:6810::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:8028::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:a83e::/48 | BGP route | AS10515 VeriSign Infrastructure & Operations | β |
| 2001:503:a83e::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:a124::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:ba3e::/48 | BGP route | AS19836 VeriSign Infrastructure & Operations | β |
| 2001:503:ba3e::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:bfb0::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:bfb0::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:c27::/48 | BGP route | AS36631 VeriSign Global Registry Services | β |
| 2001:503:c27::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:c779::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:cc2c::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:d1ae::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:d2d::/48 | BGP route | AS36625 VeriSign Global Registry Services | β |
| 2001:503:d2d::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:d414::/48 | BGP route | AS36631 VeriSign Global Registry Services | β |
| 2001:503:d414::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:e8ef::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:e8ef::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:e239::/48 | BGP route | AS12008 Vercara, LLC | β |
| 2001:503:e239::/48 | WHOIS (ARIN) | Vercara, LLC | β |
| 2001:503:eea3::/48 | BGP route | AS36631 VeriSign Global Registry Services | β |
| 2001:503:eea3::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:f3da::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:f3da::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:f189::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:f189::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:f261::/48 | BGP route | AS26134 VeriSign Infrastructure & Operations | β |
| 2001:503:f261::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:ff39::/48 | BGP route | AS7342 VeriSign Infrastructure & Operations | β |
| 2001:503:ff39::/48 | WHOIS (ARIN) | VeriSign Global Registry Services | β |
| 2001:503:ff40::/48 | BGP route | AS209242 Cloudflare London, LLC | β |
| 2001:503:ff40::/48 | WHOIS (ARIN) | .gov TLD | US |
| 2001:503:ff41::/48 | BGP route | AS209242 Cloudflare London, LLC | β |
| 2001:503:ff41::/48 | WHOIS (ARIN) | .gov TLD | US |
| 2001:503:ff42::/48 | BGP route | AS209242 Cloudflare London, LLC | β |
| 2001:503:ff42::/48 | WHOIS (ARIN) | .gov TLD | US |
| 2001:503:ff43::/48 | BGP route | AS209242 Cloudflare London, LLC | β |
| 2001:503:ff43::/48 | WHOIS (ARIN) | .gov TLD | US |