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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Browse by country

Countries with the most unannounced blocks, largest first.

Unannounced blocks in United States

27,014 blocks match, ordered by prefix.

Allocated but unannounced blocks, 20301 to 20350 of 27014
PrefixAddressesRegistryCountryAllocated
24.110.10.0/24256ARINUS23rd Mar 2004
24.110.11.0/24256ARINUS19th Nov 2024
24.110.12.0/221kARINUS19th Nov 2024
24.136.64.0/198.2kARINUS13th Sept 2001
24.143.224.0/198.2kARINUS26th Feb 2007
24.149.128.0/1732.8kARINUS21st Jan 2004
24.157.0.0/204.1kARINUS20th Nov 2007
24.170.208.0/204.1kARINUS10th Sept 2007
24.171.128.0/198.2kARINUS27th Jun 2002
24.194.0.0/15131kARINUS11th Jul 2002
24.214.184.0/24256ARINUS15th Apr 1999
24.214.186.0/24256ARINUS15th Apr 1999
24.221.0.0/1665.5kARINUS8th Dec 1998
24.223.81.0/24256ARINUS2nd Sept 2014
24.224.54.0/24256ARINUS29th Jan 2007
24.224.57.0/24256ARINUS29th Jan 2007
24.225.32.0/198.2kARINUS28th Aug 2003
24.225.64.0/198.2kARINUS28th Aug 2003
24.233.32.0/198.2kARINUS2nd Aug 2002
24.235.64.0/212kARINUS2nd Sept 2005
24.236.0.0/198.2kARINUS13th Oct 1997
24.31.64.0/1816.4kARINUS2nd Mar 1999
24.40.192.0/198.2kARINUS16th Sept 2005
24.48.160.0/24256ARINUS22nd Oct 2008
24.50.128.0/204.1kARINUS22nd May 2009
24.50.144.0/204.1kARINUS28th Oct 2009
24.56.152.0/212kARINUS17th Sept 2025
24.75.248.0/212kARINUS17th Sept 2025
24.75.96.0/204.1kARINUS1st May 2003
2400:3f20::/324.3B × /64APNICUS14th Dec 2021
2400:45c0::/324.3B × /64APNICUS21st Nov 2016
2400:51a0::/324.3B × /64APNICUS21st Jan 2022
2400:9640::/324.3B × /64APNICUS19th Jan 2017
2400:b920::/324.3B × /64APNICUS21st Oct 2022
2400:db60::/324.3B × /64APNICUS3rd Feb 2023
2401:5260::/324.3B × /64APNICUS24th Nov 2023
2401:a560::/324.3B × /64APNICUS6th Jun 2024
2401:ea60::/324.3B × /64APNICUS22nd Jan 2025
2402:9900::/324.3B × /64APNICUS22nd Nov 2011
2402:c580::/324.3B × /64APNICUS18th Aug 2015
2402:ce40::/324.3B × /64APNICUS26th Apr 2018
2402:fc40::/324.3B × /64APNICUS1st Jun 2018
2403:340::/324.3B × /64APNICUS6th Jun 2018
2403:7c40::/324.3B × /64APNICUS6th Sept 2018
2404:1ac0::/324.3B × /64APNICUS14th Dec 2018
2404:4a80::/324.3B × /64APNICUS10th Feb 2016
2404:64c0::/324.3B × /64APNICUS14th Feb 2019
2404:7440::/324.3B × /64APNICUS20th Feb 2019
2404:8b00::/324.3B × /64APNICUS24th Jul 2012
2404:9480::/324.3B × /64APNICUS22nd Mar 2016