Data as of Nov 7, 2026
203.255.128.0/19
256 anonymizer addresses · 3.1% · ISP proxySejong Networks
IPv4 market
Path
1 · Holder
2 · Leased from
not leased
4 · Use
Internet provider
anonymizer space, operator not named
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
203.255.128.0/19
From the registry to its use
- Dec 23, 2001Route objectAS9981 Saero Network Service LTDRADB route object for AS9981 Saero Network Service LTD, maintainer MAINT-AS3786203.255.156.0/23
- May 9, 2005– today
- Aug 19, 2005Route objectAS9848 Sejong NetworksREACH route object for AS9848 Sejong Networks, maintainer MAINT-REACH-NOC
- Oct 25, 2007Route objectAS10037 EUGENE INVESTMENT FUTURES Co.,Ltd.RADB route object for AS10037 EUGENE INVESTMENT FUTURES Co.,Ltd., maintainer MAINT-AS3786203.255.154.0/24
- Oct 25, 2007Route objectAS10037 EUGENE INVESTMENT FUTURES Co.,Ltd.RADB route object for AS10037 EUGENE INVESTMENT FUTURES Co.,Ltd., maintainer MAINT-AS3786203.255.159.0/24
- May 5, 2008Route objectAS10037 EUGENE INVESTMENT FUTURES Co.,Ltd.RADB route object for AS10037 EUGENE INVESTMENT FUTURES Co.,Ltd., maintainer MAINT-AS3491203.255.148.0/22
- May 5, 2008Route objectAS10037 EUGENE INVESTMENT FUTURES Co.,Ltd.RADB route object for AS10037 EUGENE INVESTMENT FUTURES Co.,Ltd., maintainer MAINT-AS3491203.255.152.0/21
- Feb 1, 2010Route objectAS9848 Sejong NetworksRADB route object for AS9848 Sejong Networks, maintainer MAINT-AS4637
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 2, 2019
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.148.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.149.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.150.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.151.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.152.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.153.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.154.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.155.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.156.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.157.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.158.0/24
- Jan 3, 2019Route objectAS38669 LG HelloVision Corp.RADB route object for AS38669 LG HelloVision Corp., maintainer MAINT-AS9318203.255.159.0/24
- todayRegistry recordSejong NetworksALLOCATED PORTABLE203.255.128.0/19
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 | 7,936 | 97% | 2 | |
| ISP proxyanonymizer | 256 | 3.1% | 1 |
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
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 203.255.148.0/22 | AS10037 | RADB | Proxy-registered route object | MAINT-AS3491 | Mar 28, 2025 |
| 203.255.148.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.148.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.149.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.149.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.150.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.150.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.151.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.151.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.152.0/21 | AS10037 | RADB | Proxy-registered route object | MAINT-AS3491 | Mar 28, 2025 |
| 203.255.152.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.152.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.153.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.153.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.154.0/24 | AS10037 | RADB | Proxy-Registered Route Object by LG Dacom(AS3786) | MAINT-AS3786 | Nov 13, 2023 |
| 203.255.154.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.154.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.155.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.155.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.156.0/23 | AS9981 | RADB | contact [email protected] if necessary | MAINT-AS3786 | Nov 13, 2023 |
| 203.255.156.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.156.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.157.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.157.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.158.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.158.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.159.0/24 | AS10037 | RADB | Proxy-Registered Route Object by LG Dacom(AS3786) | MAINT-AS3786 | Nov 13, 2023 |
| 203.255.159.0/24 | AS38669 | RADB | AS38669 | MAINT-AS9318 | Nov 13, 2023 |
| 203.255.159.0/24 | AS3809138669 | RADB | AS3809138669 | MAINT-AS9318 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 203.
255. 128. 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 29, 1996
- Status
- assigned
Report abuse
Abuse contact
- irt@
nic. or. kr - Name
- IRT-KRNIC-KR
- Handle
- IRT-KRNIC-KR