subnet.im

AS18043Department of Education, Hsinchu City

TaiwanRegistryAPNIC

As of 23rd October 2026, AS18043 (Department of Education, Hsinchu City), a network registered in Taiwan with APNIC, originates 10 IPv4 prefixes covering 35.6k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 5,192nd-largest of the 79,666 networks we see originating IPv4, and the 49th-largest of 233 in Taiwan. It is seen behind 1 upstream network, most often AS6939 (Hurricane Electric LLC). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 17% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

10

IPv6 prefixes

2

IPv4 addresses

35.6k

IPv6 /64s

4.3B

Upstream graph

The networks AS18043 is seen behind, one and two hops out, drawn from real AS paths.

AS18043Toward the internet core
Upstream graph for AS18043: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18043Department of Edu…This networkAS6939Hurricane Electri…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS18043 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS18043
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer24675

Prefixes

The largest blocks AS18043 originates, widest first.

Largest prefixes originated by AS18043
PrefixAddressesVisibility
120.104.0.0/198.2k12/77
120.104.64.0/198.2k12/77
120.104.96.0/204.1k12/77
163.19.112.0/204.1k12/77
163.19.128.0/204.1k12/77
120.104.32.0/212k12/77
163.19.104.0/212k12/77
163.19.144.0/212k12/77
144.79.66.0/2351212/77
163.28.69.0/2425612/77

Routing health

How AS18043's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%12
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more16.7%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%83.3%10

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /3933.6M × /6450.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS18043 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.