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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.93.88.0/23 | 512 | APNIC |  IN | 17th May 2017 |
| 103.94.100.0/23 | 512 | APNIC | IN | 4th Aug 2022 |
| 103.94.103.0/24 | 256 | APNIC |  HK | 6th Jun 2017 |
| 103.94.116.0/22 | 1k | APNIC |  CN | 6th Jun 2017 |
| 103.94.152.0/22 | 1k | APNIC |  AU | 7th Jun 2017 |
| 103.94.156.0/24 | 256 | APNIC | AU | 7th Jun 2017 |
| 103.94.160.0/22 | 1k | APNIC | CN | 7th Jun 2017 |
| 103.94.192.0/22 | 1k | APNIC | IN | 8th Jun 2017 |
| 103.94.196.0/22 | 1k | APNIC |  MY | 9th Jun 2017 |
| 103.94.20.0/22 | 1k | APNIC | CN | 1st Jun 2017 |
| 103.94.245.0/24 | 256 | APNIC |  ID | 15th Nov 2022 |
| 103.94.32.0/22 | 1k | APNIC | CN | 1st Jun 2017 |
| 103.94.36.0/22 | 1k | APNIC | CN | 1st Jun 2017 |
| 103.94.40.0/22 | 1k | APNIC | CN | 1st Jun 2017 |
| 103.94.44.0/22 | 1k | APNIC | CN | 1st Jun 2017 |
| 103.94.60.0/22 | 1k | RIPE NCC |  SE | 1st Jun 2017 |
| 103.94.72.0/22 | 1k | APNIC | CN | 2nd Jun 2017 |
| 103.94.88.0/22 | 1k | APNIC | CN | 2nd Jun 2017 |
| 103.94.93.0/24 | 256 | APNIC |  NZ | 5th Jun 2017 |
| 103.95.100.0/24 | 256 | APNIC | IN | 20th Jun 2017 |
| 103.95.101.0/24 | 256 | APNIC | ID | 20th Jun 2017 |
| 103.95.103.0/24 | 256 | APNIC | HK | 21st Jun 2017 |
| 103.95.128.0/22 | 1k | APNIC | CN | 21st Jun 2017 |
| 103.95.136.0/22 | 1k | APNIC | CN | 22nd Jun 2017 |
| 103.95.140.0/22 | 1k | APNIC | CN | 22nd Jun 2017 |
| 103.95.144.0/22 | 1k | APNIC | CN | 22nd Jun 2017 |
| 103.95.152.0/22 | 1k | APNIC | CN | 22nd Jun 2017 |
| 103.95.163.0/24 | 256 | APNIC |  JP | 23rd Jun 2017 |
| 103.95.176.0/22 | 1k | APNIC | HK | 23rd Jun 2017 |
| 103.95.188.0/22 | 1k | APNIC | IN | 23rd Jun 2017 |
| 103.95.200.0/22 | 1k | APNIC | IN | 23rd Jun 2017 |
| 103.95.210.0/24 | 256 | APNIC | IN | 26th Jun 2017 |
| 103.95.216.0/22 | 1k | APNIC | CN | 26th Jun 2017 |
| 103.95.220.0/22 | 1k | APNIC | CN | 27th Jun 2017 |
| 103.95.235.0/24 | 256 | APNIC | IN | 30th Jun 2017 |
| 103.95.236.0/22 | 1k | APNIC | CN | 28th Jun 2017 |
| 103.95.240.0/22 | 1k | APNIC | CN | 28th Jun 2017 |
| 103.95.244.0/22 | 1k | APNIC | CN | 28th Jun 2017 |
| 103.95.248.0/22 | 1k | APNIC | CN | 28th Jun 2017 |
| 103.95.52.0/22 | 1k | APNIC | CN | 16th Jun 2017 |
| 103.95.88.0/22 | 1k | APNIC | CN | 20th Jun 2017 |
| 103.95.92.0/22 | 1k | APNIC | CN | 20th Jun 2017 |
| 103.96.111.0/24 | 256 | APNIC | ID | 5th Jul 2017 |
| 103.96.124.0/22 | 1k | APNIC | CN | 5th Jul 2017 |
| 103.96.136.0/22 | 1k | APNIC | CN | 6th Jul 2017 |
| 103.96.143.0/24 | 256 | APNIC | IN | 7th Jul 2017 |
| 103.96.152.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.156.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.160.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.164.0/22 | 1k | APNIC | CN | 8th Jul 2017 |