$ query “AS17841” --type=asn → 1 result(s)

AS17841 · NCIA-AS

NATIONAL INFORMATION RESOURCES SERVICE

AS17841 is run by NATIONAL INFORMATION RESOURCES SERVICE and is a residential access provider, registered in South Korea. The system announces a solid 227 328 IPv4 addresses, including a /16. Its primary geographic footprint is in South Korea. No IPv6 support — it's 2026, just saying.

Basic Information

Country
🇰🇷 South Korea
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
April 30, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
461 / 88
IPv6 Prefixes (raw / aggregated)
0 / 0
IPv4 Addresses
227 328
Largest IPv4 Prefix
/16 (65 536 addresses)
Geolocated Countries
🇰🇷 South Korea (409 600 IPs)
Prefix Changed
April 24, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Downstream Customers
3 downstreams buying transit
Degree
6 unique BGP neighbors
Reach
18 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (461 total)

  • 152.99.0.0/16 (65 536 addresses (/16 prefix))
  • 27.101.0.0/16 (65 536 addresses (/16 prefix))
  • 116.67.0.0/17 (32 768 addresses (/17 prefix))
  • 125.60.0.0/18 (16 384 addresses (/18 prefix))
  • 125.128.64.0/19 (8 192 addresses (/19 prefix))
  • 203.238.160.0/20 (4 096 addresses (/20 prefix))
  • 115.84.160.0/21 (2 048 addresses (/21 prefix))
  • 222.111.248.0/21 (2 048 addresses (/21 prefix))
  • 210.99.48.0/21 (2 048 addresses (/21 prefix))
  • 222.111.168.0/22 (1 024 addresses (/22 prefix))
  • 203.242.0.0/22 (1 024 addresses (/22 prefix))
  • 211.42.72.0/22 (1 024 addresses (/22 prefix))
  • 211.173.36.0/22 (1 024 addresses (/22 prefix))
  • 168.126.120.0/22 (1 024 addresses (/22 prefix))
  • 211.253.98.0/23 (512 addresses (/23 prefix))
  • 203.233.56.0/23 (512 addresses (/23 prefix))
  • 180.210.72.0/23 (512 addresses (/23 prefix))
  • 211.42.84.0/23 (512 addresses (/23 prefix))
  • 125.61.116.0/23 (512 addresses (/23 prefix))
  • 211.39.92.0/23 (512 addresses (/23 prefix))
  • 211.34.108.0/23 (512 addresses (/23 prefix))
  • 180.210.98.0/23 (512 addresses (/23 prefix))
  • 203.233.54.0/23 (512 addresses (/23 prefix))
  • 211.173.34.0/23 (512 addresses (/23 prefix))
  • 211.253.60.0/23 (512 addresses (/23 prefix))
  • 210.178.100.0/23 (512 addresses (/23 prefix))
  • 210.90.46.0/23 (512 addresses (/23 prefix))
  • 210.103.82.0/23 (512 addresses (/23 prefix))
  • 61.72.238.0/23 (512 addresses (/23 prefix))
  • 61.72.224.0/23 (512 addresses (/23 prefix))
  • 203.254.96.0/23 (512 addresses (/23 prefix))
  • 210.99.24.0/23 (512 addresses (/23 prefix))
  • 210.103.63.0/24 (256 addresses (/24 prefix))
  • 211.39.76.0/24 (256 addresses (/24 prefix))
  • 210.90.15.0/24 (256 addresses (/24 prefix))
  • 203.254.121.0/24 (256 addresses (/24 prefix))
  • 210.95.181.0/24 (256 addresses (/24 prefix))
  • 210.95.187.0/24 (256 addresses (/24 prefix))
  • 210.95.219.0/24 (256 addresses (/24 prefix))
  • 210.97.27.0/24 (256 addresses (/24 prefix))
  • 203.254.110.0/24 (256 addresses (/24 prefix))
  • 203.243.1.0/24 (256 addresses (/24 prefix))
  • 210.99.62.0/24 (256 addresses (/24 prefix))
  • 210.99.248.0/24 (256 addresses (/24 prefix))
  • 203.242.6.0/24 (256 addresses (/24 prefix))
  • 210.103.72.0/24 (256 addresses (/24 prefix))
  • 210.103.81.0/24 (256 addresses (/24 prefix))
  • 203.242.4.0/24 (256 addresses (/24 prefix))
  • 210.104.41.0/24 (256 addresses (/24 prefix))
  • 210.104.140.0/24 (256 addresses (/24 prefix))
  • and 38 more