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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with unannounced space registered through ARIN, largest first.

Unannounced blocks in United States

26,277 blocks match, ordered by prefix.

Allocated but unannounced blocks, 23151 to 23200 of 26277
Prefix	Addresses	Registry	Country	Allocated
2607:dac0::/32	4.3B × /64	ARIN	US	10th Oct 2024
2607:dc00::/32	4.3B × /64	ARIN	US	19th Oct 2010
2607:dcc0::/36	268M × /64	ARIN	US	17th Oct 2024
2607:dd00::/32	4.3B × /64	ARIN	US	23rd Jul 2012
2607:de40::/32	4.3B × /64	ARIN	US	24th Oct 2024
2607:df00::/32	4.3B × /64	ARIN	US	23rd Jul 2012
2607:df40::/32	4.3B × /64	ARIN	US	30th Oct 2024
2607:e040::/32	4.3B × /64	ARIN	US	4th Nov 2024
2607:e200::/32	4.3B × /64	ARIN	US	16th Mar 2011
2607:e40::/32	4.3B × /64	ARIN	US	1st Dec 2022
2607:e440::/36	268M × /64	ARIN	US	2nd Dec 2024
2607:e500::/32	4.3B × /64	ARIN	US	26th Jul 2012
2607:e540::/32	4.3B × /64	ARIN	US	3rd Dec 2024
2607:e680::/32	4.3B × /64	ARIN	US	7th Dec 2016
2607:e6c0::/32	4.3B × /64	ARIN	US	10th Dec 2024
2607:e800::/32	4.3B × /64	ARIN	US	14th Jun 2010
2607:e8c0::/32	4.3B × /64	ARIN	US	17th Dec 2024
2607:e900::/32	4.3B × /64	ARIN	US	30th Jul 2012
2607:e9c0::/32	4.3B × /64	ARIN	US	26th Dec 2024
2607:ea40::/32	4.3B × /64	ARIN	US	27th Dec 2024
2607:ebc0::/32	4.3B × /64	ARIN	US	31st Dec 2024
2607:ec00::/32	4.3B × /64	ARIN	US	19th Oct 2010
2607:ec40::/32	4.3B × /64	ARIN	US	6th Jan 2025
2607:ecc0::/32	4.3B × /64	ARIN	US	7th Jan 2025
2607:ef00::/32	4.3B × /64	ARIN	US	6th Aug 2012
2607:f008::/32	4.3B × /64	ARIN	US	15th May 2007
2607:f048::/32	4.3B × /64	ARIN	US	29th May 2007
2607:f080::/32	4.3B × /64	ARIN	US	19th Jun 2007
2607:f0a0::/32	4.3B × /64	ARIN	US	12th Jul 2007
2607:f0a8::/32	4.3B × /64	ARIN	US	17th Jul 2007
2607:f0e0::/32	4.3B × /64	ARIN	US	6th Aug 2007
2607:f0e8::/32	4.3B × /64	ARIN	US	8th Aug 2007
2607:f0f8::/32	4.3B × /64	ARIN	US	14th Aug 2007
2607:f138::/32	4.3B × /64	ARIN	US	11th Sept 2007
2607:f158::/32	4.3B × /64	ARIN	US	25th Sept 2007
2607:f168::/32	4.3B × /64	ARIN	US	26th Sept 2007
2607:f198::/32	4.3B × /64	ARIN	US	11th Oct 2007
2607:f1a0::/32	4.3B × /64	ARIN	US	11th Oct 2007
2607:f1b0::/32	4.3B × /64	ARIN	US	17th Oct 2007
2607:f1e8::/32	4.3B × /64	ARIN	US	25th Oct 2007
2607:f200::/32	4.3B × /64	ARIN	US	31st Oct 2007
2607:f240::/32	4.3B × /64	ARIN	US	14th Nov 2007
2607:f260::/32	4.3B × /64	ARIN	US	3rd Dec 2007
2607:f288::/32	4.3B × /64	ARIN	US	14th Dec 2007
2607:f2a8::/32	4.3B × /64	ARIN	US	4th Jan 2008
2607:f2b0::/32	4.3B × /64	ARIN	US	8th Jan 2008
2607:f310::/32	4.3B × /64	ARIN	US	7th Feb 2008
2607:f3b8::/32	4.3B × /64	ARIN	US	24th Mar 2008
2607:f40::/32	4.3B × /64	ARIN	US	2nd Dec 2022
2607:f420::/32	4.3B × /64	ARIN	US	26th Jan 2023