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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

511 blocks match, ordered by prefix.

Allocated but unannounced blocks, 401 to 450 of 511
PrefixAddressesRegistryCountryAllocated
2406:d000::/324.3B × /64APNICKR1st Feb 2008
2406:d700::/324.3B × /64APNICKR1st May 2013
2407:2000::/324.3B × /64APNICKR13th Jul 2007
2407:3500::/324.3B × /64APNICKR17th Jun 2013
2407:5080::/324.3B × /64APNICKR20th Sept 2016
2407:5180::/324.3B × /64APNICKR20th Sept 2016
2407:6500::/324.3B × /64APNICKR3rd Jul 2013
2407:6700::/324.3B × /64APNICKR3rd Jul 2013
2407:77c0::/324.3B × /64APNICKR4th Jun 2021
2407:9100::/324.3B × /64APNICKR18th Jul 2013
2407:9b80::/324.3B × /64APNICKR21st Oct 2016
2407:b200::/324.3B × /64APNICKR9th Mar 2011
2407:b800::/324.3B × /64APNICKR19th May 2009
2407:c700::/324.3B × /64APNICKR21st Aug 2013
2407:d100::/324.3B × /64APNICKR28th Aug 2013
2602:f5d1::/4016.8M × /64ARINKR17th Jul 2025
2602:f71f::/36268M × /64ARINKR21st Jan 2025
27.118.128.0/1732.8kAPNICKR22nd Jul 2010
27.96.160.0/198.2kAPNICKR19th May 2010
2a0f:3ec0::/2934.4B × /64RIPE NCCKR22nd Oct 2025
42.8.0.0/13524kAPNICKR7th Feb 2011
43.243.216.0/221kAPNICKR16th Sept 2014
43.255.248.0/221kAPNICKR8th Aug 2014
45.126.148.0/221kAPNICKR4th Sept 2015
45.250.204.0/221kAPNICKR18th May 2016
49.143.208.0/204.1kAPNICKR12th Nov 2010
49.238.64.0/1816.4kAPNICKR6th Dec 2010
58.138.192.0/1816.4kAPNICKR3rd Aug 2006
59.150.110.0/23512APNICKR8th Nov 2004
59.150.112.0/212kAPNICKR8th Nov 2004
59.150.120.0/23512APNICKR8th Nov 2004
59.150.122.0/24256APNICKR8th Nov 2004
59.150.125.0/24256APNICKR8th Nov 2004
59.150.126.0/23512APNICKR8th Nov 2004
59.150.13.0/24256APNICKR8th Nov 2004
59.150.135.0/24256APNICKR8th Nov 2004
59.150.136.0/24256APNICKR8th Nov 2004
59.150.138.0/24256APNICKR8th Nov 2004
59.150.141.0/24256APNICKR8th Nov 2004
59.150.146.0/23512APNICKR8th Nov 2004
59.150.148.0/23512APNICKR8th Nov 2004
59.150.15.0/24256APNICKR8th Nov 2004
59.150.151.0/24256APNICKR8th Nov 2004
59.150.157.0/24256APNICKR8th Nov 2004
59.150.158.0/23512APNICKR8th Nov 2004
59.150.160.0/221kAPNICKR8th Nov 2004
59.150.164.0/24256APNICKR8th Nov 2004
59.150.166.0/23512APNICKR8th Nov 2004
59.150.171.0/24256APNICKR8th Nov 2004
59.150.173.0/24256APNICKR8th Nov 2004