AS37936 — SINA 15F,Ideal Plaza No.58 Bei Si Huan Xi Road
AS37936 announces 4 IPv4 prefixes covering 1,280 addresses and 5 IPv6 prefixes.
About this network
The AS handle SINA is held by Sina.
What it's used for
- The address space carries corporate infrastructure, evidenced by the netname SINA and reverse DNS entries like smtp254-127.sina.com.cn.
- The AS announces 1280 IPv4 addresses across 4 prefixes and 5 IPv6 prefixes, with only 2 observed neighbours, indicating a small, self-contained corporate estate rather than a transit or access network.
- Traffic from this AS consists of internal corporate services and endpoints for Sina's business operations.
Notable
- All registrants for the announced prefixes are IRT-SINA-CN, matching the announcer.
- The address inventory is finely subdivided into small /24 and /23 blocks, consistent with internal site-by-site segmentation.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 36.51.224.0/23
- 36.51.226.0/24
- 36.51.248.0/24
- 36.51.254.0/24
- 2400:89c0:1130::/44
- 2400:89c0:2100::/48
- 2400:89c0:2200::/48
- 2400:89c0:3010::/44
- 2400:89c0:6100::/48
Upstream networks
Adjacent networks
BGP / ASN / CIDR
awaiting query
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IPv4
resolving...
IPv6
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED