Data as of Nov 7, 2026
211.255.240.0/21
Anonymizer · ISP proxySejong Networks
IPv4 market
Path
1 · Holder
2 · Leased from
not leased
Operators, sellers and brokers
Proxy providers
| Name | Parent | In 211.255.240.0/21 | /24s |
|---|---|---|---|
| Novada | 2,048100% | 8 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
211.255.240.0/21
From the registry to its use
- May 9, 2005– today
- Sep 11, 2008Route objectAS10155 KOSMERADB route object for AS10155 KOSME, maintainer MAINT-AS3786211.255.240.0/23
- Jan 7, 2010Route objectAS10155 KOSMENTTCOM route object for AS10155 KOSME, maintainer MAINT-HANARO211.255.240.0/23
- Dec 29, 2017Route objectAS9845 LG HelloVision Corp.RADB route object for AS9845 LG HelloVision Corp., maintainer MAINT-AS4670211.255.240.0/23
- Jan 2, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318211.255.240.0/24
- Jan 2, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318211.255.241.0/24
- Aug 4, 2025– today
- Nov 11, 2025Route objectAS9848 Sejong NetworksRADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4670
- todayRegistry recordSejong NetworksALLOCATED PORTABLE211.255.224.0/19
- todayUsedNovadaProxy seller
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 211.255.240.0/20 since May 2005 | AS9848 | Internet provider | Sejong Networks |
More specific
Announcements inside
| Prefix | Origin | Type | Operator | Holder | RPKI |
|---|---|---|---|---|---|
| 211.255.244.0/24 since Oct 22, 2026 | AS9848 | ISP proxy | Proxy providerssold by Novada | Sejong Networks |
Network & registry
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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2025
- Current origin since
- Aug 2025 · 1.3 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS9848 | RADB | SejongTelecom.co.ltd | MAINT-AS4670 | Nov 11, 2025 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 211.255.240.0/23 | AS9845 | RADB | SejongTelecom.co.ltd | MAINT-AS4670 | Nov 13, 2023 |
| 211.255.240.0/23 | AS10155 | RADB | Proxy-Registered Route Object by LG Dacom(AS3786) | MAINT-AS3786 | Nov 13, 2023 |
| 211.255.240.0/23 | AS10155 | NTTCOM | proxy for HANARO TELECOM route | MAINT-HANARO | Jan 7, 2010 |
| 211.255.240.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 211.255.241.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 211.
255. 224. 0/ 19 - 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
- Sep 8, 2000
- Status
- assigned
Report abuse
Abuse contact
- irt@
nic. or. kr - Name
- IRT-KRNIC-KR
- Handle
- IRT-KRNIC-KR