AS9920
IMPROVE SYSTEM TECHNOLOGY CO., LTD.
AS9920 is IMPROVE SYSTEM TECHNOLOGY CO., LTD. (istvc.com.tw). It announces 256 IPv4 addresses in 1 prefix, and 0 IPv6 prefixes.
Taiwan· APNIC· allocated 2000-03-28· Education
256
IPv4 addresses announced
1
IPv4 prefix
0
IPv6 prefixes
100.00%
of its routes RPKI-valid
256
of its IPv4 geolocated
1
country
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- Taiwan256 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- ISTVC-AS-TW
- name
- IMPROVE SYSTEM TECHNOLOGY CO., LTD.
- country
- TW
- source
- apnic
- updated
- 2026-06-21
- descr
- IMPROVE SYSTEM TECHNOLOGY CO., LTD. / 19F-2., No. 37, Sec. 2, Sanmin Rd., Banqiao Dist., New Taipei City 220
- remarks
- (oid:ISTVC)
- maintainer
- MAINT-TW-TWNIC
- maintainer email
- chku@twnic.net.tw
- abuse
- TR413-AP
- abuse name
- TWNIC ROLE-ISTVC
- abuse email
- proton@istvc.com.tw
- abuse phone
- +886-2-29569810
- abuse kind
- role
- abuse country
- TW
- admin
- TR413-AP
- admin name
- TWNIC ROLE-ISTVC
- admin email
- proton@istvc.com.tw
- admin phone
- +886-2-29569810
- admin kind
- role
- admin country
- TW
- tech
- TR413-AP
- tech name
- TWNIC ROLE-ISTVC
- tech email
- proton@istvc.com.tw
- tech phone
- +886-2-29569810
- tech kind
- role
- tech country
- TW
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- 0.78%
- None here
- 0.39%
- None here
- None here
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 103.173.95.0/24 | Taiwan | Valid | 1 | 2026-10-29 |
00 · Evaluate
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.
01 · License
Then license what you use.
Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.