subnet.im

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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 ARIN, largest first.

Unannounced blocks registered through ARIN

30,441 blocks match, ordered by prefix.

Allocated but unannounced blocks, 25851 to 25900 of 30441
PrefixAddressesRegistryCountryAllocated
2604:f480::/324.3B × /64ARINUS21st Aug 2013
2604:f500::/324.3B × /64ARINUS27th May 2011
2604:f5c0::/324.3B × /64ARINUS7th Sept 2018
2604:f640::/36268M × /64ARINUS7th Sept 2018
2604:f7c0::/324.3B × /64ARINUS18th Sept 2018
2604:f800::/324.3B × /64ARINCA26th Apr 2010
2604:f8c0::/324.3B × /64ARINUS20th Sept 2018
2604:f900::/324.3B × /64ARINUS27th May 2011
2604:f940::/324.3B × /64ARINUS21st Sept 2018
2604:f980::/324.3B × /64ARINUS28th Aug 2013
2604:fa80::/324.3B × /64ARINCA28th Aug 2013
2604:fb00::/324.3B × /64ARINUS27th May 2011
2604:fb40::/324.3B × /64ARINUS26th Sept 2018
2604:fc0::/324.3B × /64ARINCA23rd Jan 2017
2604:fc40::/324.3B × /64ARINUS9th Feb 2026
2604:fd40::/324.3B × /64ARINUS2nd Oct 2018
2604:fdc0::/324.3B × /64ARINUS2nd Oct 2018
2604:ff00::/324.3B × /64ARINUS31st May 2011
2604:ff80::/324.3B × /64ARINCA13th Sept 2013
2605:1040::/324.3B × /64ARINUS5th Dec 2018
2605:10c0::/324.3B × /64ARINUS6th Dec 2018
2605:1140::/324.3B × /64ARINUS11th Dec 2018
2605:1180::/324.3B × /64ARINUS22nd Oct 2013
2605:11c0::/324.3B × /64ARINCA11th Dec 2018
2605:1240::/324.3B × /64ARINCA21st Dec 2018
2605:1300::/324.3B × /64ARINCA3rd Jun 2011
2605:1340::/324.3B × /64ARINUS3rd Jan 2019
2605:1380::/324.3B × /64ARINCA24th Oct 2013
2605:13c0::/324.3B × /64ARINUS3rd Jan 2019
2605:1400::/324.3B × /64ARINUS22nd Jul 2010
2605:1440::/324.3B × /64ARINUS3rd Jan 2019
2605:1480::/324.3B × /64ARINUS25th Oct 2013
2605:14c0::/324.3B × /64ARINUS4th Jan 2019
2605:1580::/324.3B × /64ARINUS25th Oct 2013
2605:160::/324.3B × /64ARINUS20th Jul 2026
2605:1780::/324.3B × /64ARINUS29th Oct 2013
2605:17c0::/324.3B × /64ARINUS8th Jan 2019
2605:1840::/324.3B × /64ARINUS15th Jan 2019
2605:19c0::/324.3B × /64ARINUS22nd Jan 2019
2605:1a00::/324.3B × /64ARINUS13th Dec 2010
2605:1a40::/324.3B × /64ARINUS23rd Jan 2019
2605:1a80::/324.3B × /64ARINUS6th Nov 2013
2605:1ac0::/324.3B × /64ARINUS23rd Jan 2019
2605:1b80::/324.3B × /64ARINUS6th Nov 2013
2605:1c0::/324.3B × /64ARINUS16th Jul 2026
2605:1c40::/324.3B × /64ARINUS20th Feb 2026
2605:1c80::/324.3B × /64ARINCA11th Nov 2013
2605:1d00::/324.3B × /64ARINUS8th Jun 2011
2605:1d40::/324.3B × /64ARINUS30th Jan 2019
2605:1dc0::/324.3B × /64ARINUS1st Feb 2019