AS137691 Heilongjiang Province, P.R.China.

CHINATELECOM-HEILONGJIANG-IDC - Heilongjiang Province, P.R.China. · registered in China

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in China#455largest network in CN by IPv4 space, of 601 · <0.01% of CN

Rank worldwide#47,407of 79,396 networks with IPv4

IPv627,138 x /4834 prefixes

CountryChina5,117 ASNs registered there

Open AS137691 in ASN lookup Look up an IP in this network (123.166.123.1) All networks in China

IPv4 prefixes

All 2 prefixes, in address order.

123.166.123.0/24
222.171.248.0/24

IPv6 prefixes

All 34 prefixes.

240e:1:800::/37
240e:85:8000::/44
240e:85:8010::/48
240e:85:8011::/48
240e:85:8012::/47
240e:85:8014::/46
240e:85:8018::/45
240e:85:8020::/43
240e:85:8040::/42
240e:85:8080::/41
240e:85:8100::/40
240e:85:8200::/39
240e:85:8400::/38
240e:108:4061::/48
240e:108:4861::/48
240e:308::/36
240e:308:1000::/39
240e:309::/36
240e:309:1000::/39
240e:30a::/36
240e:30a:1000::/39
240e:30b::/36
240e:30b:1000::/39
240e:608::/37
240e:608:800::/38
240e:608:c00::/40
240e:608:d00::/45
240e:608:d08::/45
240e:608:d10::/44
240e:608:d20::/43
240e:608:d40::/42
240e:608:d80::/41
240e:608:e00::/39
240e:608:1000::/39

Similar-sized networks in China

ASNNameIPv4 addresses

AS146782#452 UCASS - University Of Chinese Academy Of Social Sciences512

AS151313#453 TAIBAO-KEJI-NET - Pacific Insurance Technology Co., Ltd512

AS154010#454 XWNTL-AS-AP - Xi'an WeiShiJi Network Technology LTD512

AS205610#456 JAMESITS Huanjie Zhu512

AS211575#457 RuiNetwork Rui Feng512

AS63689#458 ESUNNET - Esun Technology(Shanghai) Co.,Ltd512

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources