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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.86.28.0/22 | 1k | APNIC |  CN | 16th Feb 2017 |
| 103.86.32.0/22 | 1k | APNIC | CN | 17th Feb 2017 |
| 103.86.58.0/23 | 512 | APNIC |  AU | 21st Feb 2017 |
| 103.86.60.0/22 | 1k | APNIC | CN | 20th Feb 2017 |
| 103.86.8.0/22 | 1k | APNIC |  PK | 16th Feb 2017 |
| 103.86.94.0/24 | 256 | APNIC |  ID | 21st Feb 2017 |
| 103.87.0.0/22 | 1k | APNIC | CN | 2nd Mar 2017 |
| 103.87.132.0/22 | 1k | APNIC | CN | 8th Mar 2017 |
| 103.87.144.0/22 | 1k | APNIC |  JP | 8th Mar 2017 |
| 103.87.156.0/22 | 1k | APNIC |  HK | 9th Mar 2017 |
| 103.87.20.0/22 | 1k | APNIC | CN | 3rd Mar 2017 |
| 103.87.201.0/24 | 256 | APNIC | ID | 10th Mar 2017 |
| 103.87.224.0/22 | 1k | APNIC | CN | 13th Mar 2017 |
| 103.87.32.0/22 | 1k | APNIC | CN | 3rd Mar 2017 |
| 103.87.37.0/24 | 256 | APNIC | ID | 6th Mar 2017 |
| 103.87.4.0/22 | 1k | APNIC | CN | 2nd Mar 2017 |
| 103.87.96.0/22 | 1k | APNIC | CN | 7th Mar 2017 |
| 103.88.0.0/22 | 1k | APNIC |  IN | 15th Mar 2017 |
| 103.88.104.0/22 | 1k | APNIC |  NZ | 21st Mar 2017 |
| 103.88.12.0/22 | 1k | APNIC | CN | 16th Mar 2017 |
| 103.88.148.0/22 | 1k | APNIC | AU | 22nd Mar 2017 |
| 103.88.16.0/22 | 1k | APNIC | CN | 16th Mar 2017 |
| 103.88.164.0/22 | 1k | APNIC | CN | 22nd Mar 2017 |
| 103.88.183.0/24 | 256 | APNIC | AU | 24th Mar 2017 |
| 103.88.20.0/22 | 1k | APNIC | CN | 16th Mar 2017 |
| 103.88.212.0/22 | 1k | APNIC | CN | 23rd Mar 2017 |
| 103.88.26.0/23 | 512 | APNIC |  LT | 16th Mar 2017 |
| 103.88.4.0/22 | 1k | APNIC | CN | 16th Mar 2017 |
| 103.88.60.0/22 | 1k | APNIC | CN | 20th Mar 2017 |
| 103.88.72.0/22 | 1k | APNIC | CN | 20th Mar 2017 |
| 103.88.79.0/24 | 256 | APNIC |  PG | 31st Oct 2022 |
| 103.88.8.0/22 | 1k | APNIC | CN | 16th Mar 2017 |
| 103.89.100.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.89.104.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.89.108.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.89.112.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.89.116.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.89.128.0/22 | 1k | APNIC | HK | 31st Mar 2017 |
| 103.89.138.0/23 | 512 | APNIC | ID | 31st Mar 2017 |
| 103.89.140.0/22 | 1k | APNIC |  SG | 31st Mar 2017 |
| 103.89.148.0/22 | 1k | APNIC | CN | 1st Apr 2017 |
| 103.89.166.0/24 | 256 | APNIC | ID | 4th Apr 2017 |
| 103.89.172.0/22 | 1k | APNIC | CN | 5th Apr 2017 |
| 103.89.252.0/22 | 1k | APNIC | IN | 6th Apr 2017 |
| 103.89.28.0/22 | 1k | APNIC | CN | 28th Mar 2017 |
| 103.89.38.0/23 | 512 | APNIC | AU | 29th Mar 2017 |
| 103.89.9.0/24 | 256 | APNIC | AU | 28th Mar 2017 |
| 103.89.96.0/22 | 1k | APNIC | CN | 30th Mar 2017 |
| 103.9.108.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 103.9.120.0/22 | 1k | APNIC | JP | 14th May 2012 |