Data as of Nov 8, 2026
203.237.160.0/21
No anonymizer space · no proxy exits in 30 daysKorea Telecom · space held by Korean Education Network
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 |
|---|---|---|---|---|
| 203.237.160.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.161.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.162.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.163.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.164.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.165.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.166.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network | |
| 203.237.167.0/24 since Dec 2023 | AS3786 | Business | Korean Education Network |
Network & registry
Announced by
Covering announcement 203.237.128.0/17
- Prefix
- 203.237.128.0/17
- Announced by
- AS4766 Korea Telecom
- Type
- Residential
- Proxy exits
- 105
- Always-on exits
- 1
- RPKI
- No RPKI
- Netname
- KREN-KR
- Registrant
- Korean Education Network
- RIR
- APNIC
Origin network
AS4766
KR
- Name
- Korea Telecom
- Type
- Internet provider
- Registered
- Apr 22, 1996
- Domain
- kt.com
- Website
- www.kt.com/eng/main.jsp
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1
Routing timeline
Who has announced 203.237.128.0/17
203.237.128.0/17
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
IRR
Route objects on 203.237.128.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS3786 not the origin | RADB | contact [email protected] if necessary | MAINT-AS3786 | Nov 13, 2023 |
| AS4766 | RADB | KORnet operation Center | MAINT-AS4766 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 203.
237. 128. 0/ 17 - Netname
- KREN-KR
- Registrant
- Korean Education Network
- Registrant country
- KR
- Organization
- Korean Education Network
- Org country
- KR
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Maintainer
- MNT-KRNIC-AP
- RIR
- APNIC
- Country
- KR
- Delegated
- Sep 29, 1996
- Status
- assigned
Report abuse
Abuse contact
- irt@
nic. or. kr - Name
- IRT-KRNIC-KR
- Handle
- IRT-KRNIC-KR