$ query “AS9848” --type=asn → 1 result(s)
AS9848 · SEJONGTELECOM-AS
SEJONG NETWORKS
AS9848 is owned by SEJONG NETWORKS and is a major transit provider, established in South Korea. The system announces a solid 990 720 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to South Korea. This AS has recently updated its prefix announcements.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #6 in South Korea — Top 10 by reach within country
Basic Information
- Country
- 🇰🇷 South Korea
- Category
- Internet Service Provider
- Network Role
- Major Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- April 29, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 198 / 74
- IPv6 Prefixes (raw / aggregated)
- 2 / 2
- IPv4 Addresses
- 990 720
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇰🇷 South Korea (1 170 944 IPs)
- Prefix Changed
- April 23, 2026
Reputation
- Reputation
- Good — 3 flagged IPs out of 990 720 total (0.00%)
Connectivity Summary
- Upstream Providers
- 10 upstreams providing transit
- Peers
- 12 networks exchanging traffic without transit
- Downstream Customers
- 52 downstreams buying transit
- Unclassified
- 3 unclassified BGP neighbors
- Degree
- 77 unique BGP neighbors
- Reach
- 4 295 networks in customer cone
Upstream Providers (10)
Prefix Lists
IPv4 Prefixes (198 total)
- 203.227.0.0/16 (65 536 addresses (/16 prefix))
- 211.239.0.0/16 (65 536 addresses (/16 prefix))
- 210.122.0.0/16 (65 536 addresses (/16 prefix))
- 210.109.0.0/16 (65 536 addresses (/16 prefix))
- 203.231.0.0/16 (65 536 addresses (/16 prefix))
- 210.121.0.0/17 (32 768 addresses (/17 prefix))
- 61.100.0.0/17 (32 768 addresses (/17 prefix))
- 61.109.128.0/17 (32 768 addresses (/17 prefix))
- 210.126.128.0/17 (32 768 addresses (/17 prefix))
- 210.116.128.0/17 (32 768 addresses (/17 prefix))
- 210.112.0.0/17 (32 768 addresses (/17 prefix))
- 210.103.128.0/17 (32 768 addresses (/17 prefix))
- 203.248.0.0/17 (32 768 addresses (/17 prefix))
- 203.243.128.0/17 (32 768 addresses (/17 prefix))
- 203.239.0.0/17 (32 768 addresses (/17 prefix))
- 203.238.0.0/17 (32 768 addresses (/17 prefix))
- 203.235.0.0/17 (32 768 addresses (/17 prefix))
- 210.127.128.0/18 (16 384 addresses (/18 prefix))
- 203.236.128.0/18 (16 384 addresses (/18 prefix))
- 210.98.64.0/18 (16 384 addresses (/18 prefix))
- 210.116.0.0/18 (16 384 addresses (/18 prefix))
- 61.250.64.0/18 (16 384 addresses (/18 prefix))
- 210.127.64.0/18 (16 384 addresses (/18 prefix))
- 61.100.128.0/18 (16 384 addresses (/18 prefix))
- 203.235.128.0/18 (16 384 addresses (/18 prefix))
- 211.111.128.0/19 (8 192 addresses (/19 prefix))
- 211.115.192.0/19 (8 192 addresses (/19 prefix))
- 211.56.192.0/19 (8 192 addresses (/19 prefix))
- 211.43.160.0/19 (8 192 addresses (/19 prefix))
- 211.39.160.0/19 (8 192 addresses (/19 prefix))
- 211.36.192.0/19 (8 192 addresses (/19 prefix))
- 211.189.160.0/19 (8 192 addresses (/19 prefix))
- 211.236.224.0/19 (8 192 addresses (/19 prefix))
- 211.238.0.0/19 (8 192 addresses (/19 prefix))
- 61.252.160.0/19 (8 192 addresses (/19 prefix))
- 211.255.224.0/19 (8 192 addresses (/19 prefix))
- 203.255.128.0/19 (8 192 addresses (/19 prefix))
- 64.23.64.0/20 (4 096 addresses (/20 prefix))
- 211.116.176.0/20 (4 096 addresses (/20 prefix))
- 211.116.192.0/20 (4 096 addresses (/20 prefix))
- 211.172.96.0/20 (4 096 addresses (/20 prefix))
- 61.97.96.0/20 (4 096 addresses (/20 prefix))
- 61.97.64.0/20 (4 096 addresses (/20 prefix))
- 66.232.136.0/21 (2 048 addresses (/21 prefix))
- 202.30.232.0/21 (2 048 addresses (/21 prefix))
- 66.232.144.0/22 (1 024 addresses (/22 prefix))
- 203.255.116.0/22 (1 024 addresses (/22 prefix))
- 202.30.240.0/22 (1 024 addresses (/22 prefix))
- 203.240.144.0/22 (1 024 addresses (/22 prefix))
- 203.255.112.0/23 (512 addresses (/23 prefix))
- and 24 more
IPv6 Prefixes (2 total)
- 2001:3a8::/32
- 2001:cf0::/32