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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,936 blocks match, ordered by prefix.

Allocated but unannounced blocks, 15001 to 15050 of 26936
PrefixAddressesRegistryCountryAllocated
199.89.235.0/24256ARINUS1st Mar 1994
199.89.236.0/221kARINUS28th Feb 1994
199.89.240.0/23512ARINUS28th Feb 1994
199.89.242.0/24256ARINUS28th Feb 1994
199.89.243.0/24256ARINUS28th Feb 1994
199.89.244.0/23512ARINUS28th Feb 1994
199.89.246.0/24256ARINUS28th Feb 1994
199.89.248.0/24256ARINUS1st Mar 1994
199.89.249.0/24256ARINUS1st Mar 1994
199.89.252.0/24256ARINUS7th Oct 2026
199.89.253.0/24256ARINUS1st Mar 1994
199.89.32.0/204.1kARINUS23rd Feb 1994
199.89.48.0/24256ARINUS23rd Feb 1994
199.89.56.0/212kARINUS10th Mar 2009
199.9.248.0/212kARINUS15th Oct 2008
199.91.0.0/212kARINUS4th Jan 1994
199.91.132.0/221kARINUS4th Feb 2011
199.91.168.0/221kARINUS8th Feb 2011
199.91.172.0/221kARINUS8th Feb 2011
199.91.222.0/23512ARINUS10th Feb 2011
199.91.236.0/221kARINUS11th Feb 2011
199.91.42.0/23512ARINUS14th Aug 2012
199.91.88.0/221kARINUS30th Jan 2012
199.96.12.0/221kARINUS16th Mar 2009
199.96.156.0/221kARINUS16th Feb 2011
199.96.160.0/221kARINUS16th Feb 2011
199.96.172.0/221kARINUS18th Feb 2011
20.128.0.0/1665.5kARINUS18th Oct 2017
20.130.0.0/1665.5kARINUS18th Oct 2017
20.144.0.0/14262kARINUS18th Oct 2017
20.176.0.0/14262kARINUS18th Oct 2017
20.180.0.0/14262kARINUS22nd Feb 2017
20.32.0.0/1665.5kARINUS4th Sept 1989
200.0.94.0/24256ARINUS10th Feb 1994
200.10.155.0/24256ARINUS28th Apr 1994
200.10.160.0/24256ARINUS5th May 1994
200.110.232.0/212kARINUS28th Jul 2022
200.16.88.0/24256ARINUS31st Mar 1995
200.240.0.0/198.2kRIPE NCCUS17th Nov 1999
2001:1510::/324.3B × /64RIPE NCCUS23rd Jul 2003
2001:1818::/324.3B × /64ARINUS20th Jun 2003
2001:1840::/324.3B × /64ARINUS27th Jun 2003
2001:1888::/324.3B × /64ARINUS15th Oct 2003
2001:18a0::/324.3B × /64ARINUS27th Oct 2003
2001:1910::/324.3B × /64ARINUS8th Jan 2004
2001:1950::/324.3B × /64ARINUS13th Apr 2004
2001:1958::/324.3B × /64ARINUS20th Apr 2004
2001:19a0::/324.3B × /64ARINUS13th Jul 2004
2001:19c8::/324.3B × /64ARINUS13th Sept 2004
2001:19e0::/324.3B × /64ARINUS11th Oct 2004