Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
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Countries with unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,595 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.188.174.0/24 | 256 | APNIC |  PH | 20th Jul 1992 |
| 192.188.175.0/24 | 256 | APNIC |  ID | 20th Jul 1992 |
| 192.188.75.0/24 | 256 | APNIC |  JP | 23rd Jun 1993 |
| 192.188.76.0/24 | 256 | APNIC | JP | 23rd Jun 1993 |
| 192.188.77.0/24 | 256 | APNIC | JP | 15th Jun 1993 |
| 192.188.78.0/23 | 512 | APNIC | JP | 15th Jun 1993 |
| 192.188.82.0/23 | 512 | APNIC |  HK | 5th Jan 2018 |
| 192.188.92.0/24 | 256 | APNIC | JP | 15th Feb 1994 |
| 192.189.159.0/24 | 256 | APNIC |  AU | 11th Feb 2011 |
| 192.189.223.0/24 | 256 | APNIC | PH | 31st Jul 1992 |
| 192.189.229.0/24 | 256 | APNIC | AU | 31st Jul 1992 |
| 192.189.230.0/24 | 256 | APNIC | AU | 24th Jan 2011 |
| 192.189.231.0/24 | 256 | APNIC | AU | 10th Feb 2011 |
| 192.189.232.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.189.34.0/24 | 256 | APNIC |  NZ | 18th Jun 1992 |
| 192.190.108.0/24 | 256 | APNIC | NZ | 23rd Jun 1992 |
| 192.190.181.0/24 | 256 | APNIC | AU | 7th Aug 2025 |
| 192.190.208.0/24 | 256 | APNIC | AU | 30th Jun 1992 |
| 192.190.210.0/23 | 512 | APNIC | AU | 30th Jun 1992 |
| 192.190.212.0/22 | 1k | APNIC | AU | 30th Jun 1992 |
| 192.190.66.0/24 | 256 | APNIC | AU | 19th Jun 1992 |
| 192.195.102.0/24 | 256 | APNIC | AU | 21st Jul 1992 |
| 192.195.14.0/24 | 256 | APNIC | NZ | 10th Jul 1992 |
| 192.195.170.0/24 | 256 | APNIC | AU | 30th Jul 1992 |
| 192.195.219.0/24 | 256 | APNIC | NZ | 5th Aug 1992 |
| 192.195.39.0/24 | 256 | APNIC |  KR | 15th Jul 1992 |
| 192.195.40.0/24 | 256 | APNIC | KR | 15th Jul 1992 |
| 192.200.64.0/20 | 4.1k | APNIC | NZ | 6th Aug 1992 |
| 192.203.154.0/24 | 256 | APNIC | NZ | 17th Sept 1992 |
| 192.203.156.0/23 | 512 | APNIC |  IN | 1st Jan 2026 |
| 192.203.176.0/24 | 256 | APNIC | AU | 18th Sept 1992 |
| 192.203.183.0/24 | 256 | APNIC | HK | 7th Feb 2011 |
| 192.203.184.0/23 | 512 | APNIC | HK | 7th Feb 2011 |
| 192.203.213.0/24 | 256 | APNIC | AU | 9th Oct 1992 |
| 192.203.235.0/24 | 256 | APNIC | AU | 23rd Nov 1992 |
| 192.203.99.0/24 | 256 | APNIC | NZ | 7th Feb 2011 |
| 192.206.154.0/24 | 256 | APNIC | NZ | 28th Aug 1992 |
| 192.206.155.0/24 | 256 | APNIC | NZ | 28th Aug 1992 |
| 192.206.156.0/24 | 256 | APNIC | NZ | 28th Aug 1992 |
| 192.207.113.0/24 | 256 | APNIC | AU | 25th Aug 1992 |
| 192.207.119.0/24 | 256 | APNIC | AU | 26th Aug 1992 |
| 192.207.161.0/24 | 256 | APNIC | AU | 4th Sept 1992 |
| 192.207.165.0/24 | 256 | APNIC | AU | 4th Sept 1992 |
| 192.207.254.0/24 | 256 | APNIC | ID | 23rd Jan 2026 |
| 192.207.33.0/24 | 256 | APNIC | AU | 18th Aug 1992 |
| 192.227.1.0/24 | 256 | APNIC | PH | 30th Sept 1992 |
| 192.227.2.0/23 | 512 | APNIC | PH | 30th Sept 1992 |
| 192.227.4.0/22 | 1k | APNIC | PH | 30th Sept 1992 |
| 192.227.8.0/21 | 2k | APNIC | PH | 30th Sept 1992 |
| 192.230.16.0/20 | 4.1k | APNIC | NZ | 7th Feb 2011 |