4 ms·

Is there a list or some way to discover which blocks are like this that aren't in use?

• p1mrx 6y ago
  https://bgp.potaroo.net/ipv4-stats/prefixes_unadv_pool.txt https://bgp.potaroo.net/ipv4-stats/prefixes_unadv_pool.txt
  • gpm 6y ago
    Is this complete? All of 4.0/8 10.0/8 12.0/8 15.0/8 16.0/8 17.0/8... are unrouted? Edit(v2): Complete list of unrouted (per that list) /8s along with their IANA designation 0: IANA - Local Identification 4, 15, 16, 32, 40, 44: Administered by ARIN 10: IANA - Private Use 12: AT&T Bell Laboratories 17: Apple Computer Inc. 38: PSINet, Inc 53: Daimler AG 55: DoD Network Information Center 57: Administered by RIPE NCC 73: ARIN 126: APNIC 127: IANA - Loopback 214: US-DOD 224 to 239: Multicast 240 to 255: Future use (designations from https://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml https://www.iana.org/assignments/ipv4-address-space/ipv4-add...)
    • quesera 6y ago
      > All of (...) 17.0/8... are unrouted? Definitely not complete: apple.com. 1424 IN A 17.172.224.47 apple.com. 1424 IN A 17.178.96.59 apple.com. 1424 IN A 17.142.160.59
    • dylz 6y ago
      Most of these are routed and in very active use. I have suballocations of large chunks from 12/8 and 38/8. People will be unhappy if you picked most of them. 73/8 is entirely owned by Comcast and used for customers. 44 is no longer a /8, but sold+split and half in active use by AWS.