AS9649 MOPH-TH-AP Information Technology Office

AS9649 (MOPH-TH-AP) is held by the Ministry of Public Health of Thailand — the registry object's bare "Information Technology Office" is the ministry's ICT centre at the Permanent Secretary Office in Nonthaburi. The AS originates the ministry's 203.157.0.0/16 and serves the national public-health network: the ministry itself, its departments, and the provincial hospitals and health offices under it.

What it's used for

RIS sees 14 IPv4 prefixes totalling 65,536 addresses — a full /16, deaggregated into a handful of /20s, /21s, /23s and /24s — plus a single IPv6 prefix (2001:df5:5c00::/48), announced through only 4 observed neighbours.

That is an unusually clean signature. Every announced prefix without exception falls inside 203.157.0.0/16; there is no scattered inventory, no third-party space, nothing borrowed. A single /16 held whole by one organisation and carved into internal chunks is what a national ministry looks like when it was allocated its address space directly and has run it ever since. The four upstreams are Thai carriers providing transit; with a /16 behind them and no peering breadth, none of this traffic is transiting onward. Sampled reverse DNS returns wifi.moph.go.th, an in-house .go.th government name, consistent with the space carrying ministry-operated services rather than anyone else's.

Notable

• The registry holder string names only the "Information Technology Office", which is easy to misread as a generic IT company; it is the ministry's own ICT unit.
• Thai public-hospital and provincial health-office systems commonly sit inside this /16, so the network's reach extends well beyond the ministry's head office.