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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Unannounced blocks in United States

27,001 blocks match, ordered by prefix.

Allocated but unannounced blocks, 23601 to 23650 of 27001
Prefix	Addresses	Registry	Country	Allocated
2607:f7f0::/32	4.3B × /64	ARIN	US	10th Feb 2009
2607:f80::/32	4.3B × /64	ARIN	US	9th Mar 2016
2607:f818::/32	4.3B × /64	ARIN	US	17th Feb 2009
2607:f828::/32	4.3B × /64	ARIN	US	19th Feb 2009
2607:f880::/32	4.3B × /64	ARIN	US	5th Mar 2009
2607:f888::/32	4.3B × /64	ARIN	US	6th Mar 2009
2607:f8d0::/32	4.3B × /64	ARIN	US	30th Mar 2009
2607:f908::/32	4.3B × /64	ARIN	US	8th Apr 2009
2607:f910::/32	4.3B × /64	ARIN	US	9th Apr 2009
2607:f950::/32	4.3B × /64	ARIN	US	27th Apr 2009
2607:f9b0::/32	4.3B × /64	ARIN	US	5th May 2009
2607:f9b8::/32	4.3B × /64	ARIN	US	5th May 2009
2607:f9d8::/32	4.3B × /64	ARIN	US	6th May 2009
2607:fa28::/32	4.3B × /64	ARIN	US	11th May 2009
2607:fa68::/32	4.3B × /64	ARIN	US	20th May 2009
2607:fa90::/32	4.3B × /64	ARIN	US	21st May 2009
2607:faa8::/32	4.3B × /64	ARIN	US	22nd May 2009
2607:fab0::/32	4.3B × /64	ARIN	US	28th May 2009
2607:fab8::/32	4.3B × /64	ARIN	US	28th May 2009
2607:fac0::/32	4.3B × /64	ARIN	US	29th May 2009
2607:fae8::/32	4.3B × /64	ARIN	US	8th Jun 2009
2607:faf0::/32	4.3B × /64	ARIN	US	9th Jun 2009
2607:fb30::/32	4.3B × /64	ARIN	US	23rd Jun 2009
2607:fb38::/32	4.3B × /64	ARIN	US	24th Jun 2009
2607:fb48::/32	4.3B × /64	ARIN	US	24th Jun 2009
2607:fb70::/32	4.3B × /64	ARIN	US	7th Jul 2009
2607:fb88::/32	4.3B × /64	ARIN	US	13th Jul 2009
2607:fba0::/32	4.3B × /64	ARIN	US	14th Jul 2009
2607:fbb0::/32	4.3B × /64	ARIN	US	16th Jul 2009
2607:fbb8::/32	4.3B × /64	ARIN	US	20th Jul 2009
2607:fbf8::/32	4.3B × /64	ARIN	US	24th Jul 2009
2607:fc0::/32	4.3B × /64	ARIN	US	6th Dec 2022
2607:fc20::/32	4.3B × /64	ARIN	US	27th Jul 2009
2607:fca0::/32	4.3B × /64	ARIN	US	19th Aug 2009
2607:fca8::/32	4.3B × /64	ARIN	US	19th Aug 2009
2607:fcd0::/32	4.3B × /64	ARIN	US	24th Aug 2009
2607:fd38::/32	4.3B × /64	ARIN	US	17th Sept 2009
2607:fd40::/32	4.3B × /64	ARIN	US	18th Sept 2009
2607:fd60::/32	4.3B × /64	ARIN	US	25th Sept 2009
2607:fdd0::/32	4.3B × /64	ARIN	US	19th Oct 2009
2607:fde0::/32	4.3B × /64	ARIN	US	20th Oct 2009
2607:fe18::/36	268M × /64	ARIN	US	26th Oct 2009
2607:fe30::/32	4.3B × /64	ARIN	US	27th Oct 2009
2607:fe38::/32	4.3B × /64	ARIN	US	27th Oct 2009
2607:fe58::/32	4.3B × /64	ARIN	US	29th Oct 2009
2607:fe60::/32	4.3B × /64	ARIN	US	30th Oct 2009
2607:fec0::/32	4.3B × /64	ARIN	US	19th Nov 2009
2607:ff48::/32	4.3B × /64	ARIN	US	28th Dec 2009
2607:ff90::/32	4.3B × /64	ARIN	US	15th Jan 2010
2607:ffe8::/32	4.3B × /64	ARIN	US	22nd Jan 2010