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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,871 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.194.76.0/22 | 1k | APNIC |  SG | 6th Aug 2015 |
| 103.194.96.0/22 | 1k | APNIC |  IN | 6th Aug 2015 |
| 103.195.0.0/22 | 1k | APNIC |  KH | 2nd Sept 2015 |
| 103.195.104.0/22 | 1k | APNIC |  CN | 8th Sept 2015 |
| 103.195.112.0/22 | 1k | APNIC | CN | 9th Sept 2015 |
| 103.195.120.0/21 | 2k | APNIC | IN | 9th Sept 2015 |
| 103.195.132.0/22 | 1k | APNIC |  HK | 10th Sept 2015 |
| 103.195.152.0/22 | 1k | APNIC | CN | 11th Sept 2015 |
| 103.195.156.0/22 | 1k | APNIC |  ID | 11th Sept 2015 |
| 103.195.160.0/22 | 1k | APNIC | CN | 11th Sept 2015 |
| 103.195.164.0/22 | 1k | APNIC | ID | 11th Sept 2015 |
| 103.195.172.0/22 | 1k | APNIC | IN | 11th Sept 2015 |
| 103.195.176.0/21 | 2k | APNIC | IN | 11th Sept 2015 |
| 103.195.196.0/22 | 1k | APNIC | IN | 14th Sept 2015 |
| 103.195.224.0/22 | 1k | APNIC | IN | 14th Sept 2015 |
| 103.195.228.0/22 | 1k | APNIC | IN | 14th Sept 2015 |
| 103.195.232.0/22 | 1k | APNIC | IN | 14th Sept 2015 |
| 103.195.29.0/24 | 256 | APNIC | ID | 4th Sept 2015 |
| 103.195.32.0/22 | 1k | APNIC | SG | 4th Sept 2015 |
| 103.195.40.0/21 | 2k | APNIC | IN | 4th Sept 2015 |
| 103.195.76.0/22 | 1k | APNIC | IN | 7th Sept 2015 |
| 103.195.8.0/22 | 1k | APNIC |  NZ | 2nd Sept 2015 |
| 103.195.84.0/22 | 1k | APNIC | IN | 7th Sept 2015 |
| 103.195.92.0/22 | 1k | APNIC | IN | 7th Sept 2015 |
| 103.195.96.0/22 | 1k | APNIC | IN | 7th Sept 2015 |
| 103.196.117.0/24 | 256 | APNIC | IN | 23rd Sept 2015 |
| 103.196.12.0/23 | 512 | APNIC |  TH | 15th Sept 2015 |
| 103.196.124.0/22 | 1k | APNIC | HK | 22nd Sept 2015 |
| 103.196.168.0/22 | 1k | APNIC | CN | 25th Sept 2015 |
| 103.196.172.0/23 | 512 | APNIC |  TW | 25th Sept 2015 |
| 103.196.192.0/24 | 256 | APNIC | IN | 28th Sept 2015 |
| 103.196.196.0/22 | 1k | APNIC | IN | 28th Sept 2015 |
| 103.196.228.0/22 | 1k | APNIC | IN | 29th Sept 2015 |
| 103.196.248.0/22 | 1k | APNIC |  VN | 30th Sept 2015 |
| 103.196.72.0/22 | 1k | APNIC | CN | 17th Sept 2015 |
| 103.196.80.0/22 | 1k | APNIC | NZ | 18th Sept 2015 |
| 103.196.84.0/24 | 256 | APNIC |  AU | 18th Sept 2015 |
| 103.196.96.0/22 | 1k | APNIC | CN | 18th Sept 2015 |
| 103.197.108.0/22 | 1k | APNIC | IN | 6th Oct 2015 |
| 103.197.180.0/22 | 1k | APNIC | CN | 8th Oct 2015 |
| 103.197.20.0/22 | 1k | APNIC |  MY | 1st Oct 2015 |
| 103.197.214.0/23 | 512 | APNIC | AU | 9th Oct 2015 |
| 103.198.10.0/23 | 512 | APNIC | IN | 13th Oct 2015 |
| 103.198.100.0/22 | 1k | APNIC | IN | 16th Oct 2015 |
| 103.198.116.0/22 | 1k | APNIC | ID | 19th Oct 2015 |
| 103.198.130.0/24 | 256 | APNIC | AU | 21st Oct 2015 |
| 103.198.131.0/24 | 256 | APNIC | ID | 21st Oct 2015 |
| 103.198.156.0/22 | 1k | APNIC | CN | 20th Oct 2015 |
| 103.198.176.0/22 | 1k | APNIC |  TL | 21st Oct 2015 |
| 103.198.180.0/22 | 1k | APNIC | CN | 21st Oct 2015 |