Data as of Nov 3, 2026
210.103.224.0/19
No anonymizer space · no proxy exits in 30 daysSejong Networks
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 210.103.240.0/24 since Apr 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.241.0/24 since Apr 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.242.0/24 since Apr 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.243.0/24 since May 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.244.0/24 since May 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.245.0/24 since May 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.246.0/24 since May 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.247.0/24 since May 2013 | AS10158 | Business | Sejong Networks | |
| 210.103.253.0/24 since Jun 2025 | AS10178 | Business | Sejong Networks | |
| 210.103.254.0/24 since Jun 2025 | AS10178 | Business | Sejong Networks |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 210.103.128.0/17 | 32,768 | SEJONG | Sejong Networks | ALLOCATED PORTABLE | — | [email protected] |
| └ 210.103.224.0/19 | 8,192 | KRNIC-KR | KRNIC | ALLOCATED PORTABLE | — | [email protected] |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
8,192 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Internet provider | 5,632 | 69% | 3 | |
| Hosting | 2,048 | 25% | 8 | |
| Business | 512 | 6.3% | 2 |
Network & registry
Announced by
Covering announcement 210.103.128.0/17
- Prefix
- 210.103.128.0/17
- Announced by
- AS9848 Sejong Networks
- Type
- Internet provider
- RPKI
- No RPKI
- Netname
- SEJONG-KR
- Registrant
- Sejong Networks
- RIR
- APNIC
Origin network
AS9848
KR
- Name
- Sejong Networks
- Type
- Internet provider
- Registered
- Feb 4, 2000
- Domain
- sejongnetworks.com
- Website
- en.sejongnetworks.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 210.103.128.0/17
210.103.128.0/17
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 210.103.128.0/17
- Netname
- SEJONG-KR
- Registrant
- Sejong Networks
- Registrant country
- KR
- Organization
- Sejong Networks
- Org country
- KR
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Maintainer
- MNT-KRNIC-AP
- RIR
- APNIC
- Country
- KR
- Delegated
- Dec 6, 1997
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- IRT-KRNIC-KR
- Handle
- IRT-KRNIC-KR