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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

6,735 blocks match, ordered by prefix.

Allocated but unannounced blocks, 4101 to 4150 of 6735
Prefix	Addresses	Registry	Country	Allocated
2400:60c0::/32	4.3B × /64	APNIC	CN	6th Dec 2016
2400:61c0::/32	4.3B × /64	APNIC	CN	7th Dec 2016
2400:6200::/32	4.3B × /64	APNIC	CN	16th Mar 2010
2400:6640::/32	4.3B × /64	APNIC	CN	9th Dec 2016
2400:66a0::/32	4.3B × /64	APNIC	CN	22nd Mar 2022
2400:66c0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:66e0::/32	4.3B × /64	APNIC	CN	22nd Mar 2022
2400:6740::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:67a0::/32	4.3B × /64	APNIC	CN	24th Mar 2022
2400:67c0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6840::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:68c0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6940::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:69c0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6a00::/32	4.3B × /64	APNIC	CN	16th Mar 2010
2400:6a40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6ac0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6b40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6bc0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6c40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6cc0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6d40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6da0::/32	4.3B × /64	APNIC	CN	8th Apr 2022
2400:6dc0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6e00::/32	4.3B × /64	APNIC	CN	16th Mar 2010
2400:6e40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6ec0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6f40::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:6f80::/32	4.3B × /64	APNIC	CN	9th Dec 2013
2400:6fc0::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:7040::/32	4.3B × /64	APNIC	CN	10th Dec 2016
2400:70a0::/32	4.3B × /64	APNIC	CN	19th Apr 2022
2400:7140::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:71c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7200::/32	4.3B × /64	APNIC	CN	16th Mar 2010
2400:7240::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:72c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:72e0::/32	4.3B × /64	APNIC	CN	21st Apr 2022
2400:7340::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:73c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7440::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:74c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7540::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:75c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7640::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7680::/32	4.3B × /64	APNIC	CN	12th Dec 2013
2400:76c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:7740::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:77c0::/32	4.3B × /64	APNIC	CN	12th Dec 2016
2400:79c0::/32	4.3B × /64	APNIC	CN	13th Dec 2016