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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.6.180.0/24 | 256 | APNIC |  ID | 2nd Mar 2012 |
| 103.6.2.0/24 | 256 | APNIC |  IN | 14th Feb 2012 |
| 103.6.27.0/24 | 256 | APNIC | IN | 16th Feb 2012 |
| 103.6.34.0/24 | 256 | APNIC | ID | 16th Feb 2012 |
| 103.6.36.0/22 | 1k | APNIC | ID | 16th Feb 2012 |
| 103.6.68.0/22 | 1k | APNIC |  JP | 21st Feb 2012 |
| 103.6.76.0/22 | 1k | APNIC |  CN | 21st Feb 2012 |
| 103.6.92.0/22 | 1k | APNIC | JP | 21st Feb 2012 |
| 103.60.0.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 103.60.112.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.116.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.128.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.140.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.190.0/23 | 512 | APNIC |  HK | 28th Dec 2022 |
| 103.60.28.0/22 | 1k | APNIC | IN | 10th Jun 2015 |
| 103.60.36.0/22 | 1k | APNIC | JP | 10th Jun 2015 |
| 103.60.40.0/22 | 1k | APNIC | IN | 10th Jun 2015 |
| 103.60.44.0/22 | 1k | APNIC | CN | 10th Jun 2015 |
| 103.60.48.0/21 | 2k | APNIC | IN | 10th Jun 2015 |
| 103.60.68.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.72.0/21 | 2k | APNIC | IN | 11th Jun 2015 |
| 103.60.80.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.60.84.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 103.61.140.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.156.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.160.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.164.0/22 | 1k | APNIC | IN | 29th Jun 2015 |
| 103.61.172.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.176.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.180.0/22 | 1k | APNIC | IN | 29th Jun 2015 |
| 103.61.200.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 103.61.204.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 103.61.208.0/21 | 2k | APNIC | IN | 30th Jun 2015 |
| 103.61.216.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 103.61.228.0/23 | 512 | APNIC |  AU | 1st Jul 2015 |
| 103.61.232.0/23 | 512 | APNIC | ID | 30th Dec 2022 |
| 103.61.244.0/22 | 1k | APNIC | JP | 2nd Jul 2015 |
| 103.61.32.0/22 | 1k | APNIC | IN | 22nd Jun 2015 |
| 103.61.40.0/24 | 256 | APNIC | AU | 25th Sept 2022 |
| 103.61.41.0/24 | 256 | APNIC | ID | 23rd Jun 2015 |
| 103.61.52.0/22 | 1k | APNIC | IN | 23rd Jun 2015 |
| 103.61.56.0/22 | 1k | APNIC | IN | 23rd Jun 2015 |
| 103.61.64.0/22 | 1k | APNIC | IN | 24th Jun 2015 |
| 103.61.76.0/22 | 1k | APNIC | IN | 24th Jun 2015 |
| 103.61.80.0/21 | 2k | APNIC | IN | 24th Jun 2015 |
| 103.61.88.0/22 | 1k | APNIC | IN | 24th Jun 2015 |
| 103.62.100.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.104.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.108.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.112.0/22 | 1k | APNIC | CN | 6th Jul 2015 |