AS9457 — DREAMX-AS DREAMLINE CO.

Network type: hosting

AS9457 announces 399 IPv4 prefixes covering 782,336 addresses and 1 IPv6 prefixes.

About this network

AS9457 (DREAMX-AS) is held by Dreamline Co., Ltd. (드림라인), a South Korean telecom operator founded in 1997 that builds and runs its own nationwide fibre backbone. Its business today is business-to-business: leased lines, dedicated internet access, data-centre (IDC) services, business messaging and tower/utility network services. Despite the address footprint, it is not a consumer broadband ISP.

What it's used for

RIS observes 110 IPv4 prefixes covering roughly 900,000 addresses, one IPv6 prefix (2001:c48::/32), and 57 BGP neighbours. The IPv4 space is dominated by whole classful-era /16s — 121.53.0.0/16, 220.230.0.0/16, 61.107.0.0/16, 211.249.0.0/16 and more — the kind of large blocks a network only gets by having been an eyeball provider early.

That is exactly the history: Dreamline built a national network in 1998 and sold consumer high-speed internet in the Seoul region, but handed the entire consumer broadband business to Hanaro Telecom in 2003 when SeAH Group took over the company. The /16s stayed. The customers did not. What the space carries now is enterprise dedicated-line customers, IDC/colocation tenants, and wholesale connectivity — its named customer base runs to mobile carriers, other ISPs, financial institutions and IT companies, and it is an AWS Direct Connect partner.

Fifty-seven neighbours on ~900k addresses is the middle ground the evidence points to: too many peers for a pure end-site, far too few for a tier-1 transit carrier. It is a mid-sized national carrier reselling connectivity and hosting.

Notable

• PeeringDB still lists this network as "Cable/DSL/ISP" with 100–200 Gbps of balanced traffic. That label is more than two decades stale — the retail broadband business was divested in 2003 — and is a good example of a directory entry describing a company's past rather than its inventory.
• Ownership has changed repeatedly: a Korea Expressway Corporation / CJ joint venture at founding, then Hanaro Telecom, then SeAH Group, then the private-equity firm EQ Partners in December 2014.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.199.56.0/24
• 45.14.234.0/23
• 45.15.106.0/23
• 49.254.80.0/24
• 49.254.105.0/24
• 59.150.0.0/21
• 59.150.12.0/24
• 59.150.14.0/24
• 59.150.16.0/23
• 59.150.22.0/23
• 59.150.42.0/24
• 59.150.45.0/24
• 59.150.46.0/23
• 59.150.48.0/22
• 59.150.102.0/23
• 59.150.104.0/23
• 59.150.106.0/24
• 59.150.123.0/24
• 59.150.124.0/24
• 59.150.128.0/22
• 59.150.132.0/23
• 59.150.134.0/24
• 59.150.137.0/24
• 59.150.139.0/24
• 59.150.140.0/24
• 59.150.142.0/23
• 59.150.144.0/23
• 59.150.150.0/24
• 59.150.152.0/22
• 59.150.156.0/24
• 59.150.165.0/24
• 59.150.168.0/23
• 59.150.170.0/24
• 59.150.172.0/24
• 59.150.194.0/24
• 59.150.196.0/23
• 59.150.208.0/20
• 59.150.224.0/19
• 61.96.0.0/19
• 61.96.32.0/20
• 61.96.48.0/23
• 61.96.52.0/22
• 61.96.56.0/21
• 61.96.80.0/22
• 61.96.84.0/23
• 61.96.87.0/24
• 61.96.88.0/22
• 61.96.92.0/23
• 61.96.95.0/24
• 61.96.96.0/24
• 61.96.98.0/23
• 61.96.101.0/24
• 61.96.102.0/23
• 61.96.104.0/21
• 61.96.112.0/20
• 61.96.128.0/21
• 61.96.136.0/22
• 61.96.140.0/23
• 61.96.142.0/24
• 61.96.144.0/20
• 61.96.160.0/21
• 61.96.178.0/23
• 61.96.180.0/22
• 61.96.184.0/21
• 61.96.192.0/21
• 61.96.200.0/22
• 61.96.204.0/23
• 61.96.208.0/20
• 61.96.224.0/20
• 61.103.0.0/22
• 61.103.7.0/24
• 61.103.8.0/21
• 61.103.16.0/23
• 61.103.18.0/24
• 61.103.20.0/22
• 61.103.24.0/21
• 61.103.32.0/19
• 61.103.64.0/18
• 61.103.128.0/17
• 61.107.0.0/20
• 61.107.16.0/21
• 61.107.24.0/23
• 61.107.28.0/22
• 61.107.32.0/19
• 61.107.64.0/18
• 61.107.128.0/20
• 61.107.144.0/22
• 61.107.148.0/23
• 61.107.151.0/24
• 61.107.152.0/21
• 61.107.160.0/19
• 61.107.192.0/22
• 61.107.204.0/22
• 61.107.208.0/20
• 61.107.224.0/22
• 61.107.228.0/23
• 61.107.231.0/24
• 61.107.232.0/22
• 61.107.236.0/23
• 61.107.238.0/24

and 300 more.

Upstream networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS3786 LG DACOM Corporation
• AS24482 SG.GS
• AS9957 KINX
• AS9002 RETN Limited

Downstream networks

• AS38676 flexnetworks
• AS17878 DREAMMARK1
• AS17608 ABN
• AS10054 CMB Kwangju Broadcasting
• AS38684 CMB Daejeon Broadcasting Co,.Ltd
• AS38133 CMB
• AS38661 abcle
• AS38680 CMB
• AS21859 Zenlayer Inc
• AS9781 GREEN CABLE TELEVISION STATION
• AS17583 Keumgang Cable Network
• AS9757 CMB DONDAEMOON BROADCASTING
• AS38387 CMB Sejong Broadcasting Co,.Ltd
• AS38673 Korea Cable TV Kwangju Broadcasting
• AS18168 CMB TAEGU BROADCAST SUSEONG
• AS139341 ACE
• AS45374 CCS
• AS38690 HyosungITX
• AS199524 G-Core Labs S.A.
• AS23908 IIAC
• AS17838 HYUNDAI HOMESHOPPING
• AS38424 KOREA CABLE TELECOM
• AS9771 Media Synnara
• AS38101 Yulchon LLC
• AS55623 Korea Insurance Development Institute

Adjacent networks

• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS38676 flexnetworks
• AS17878 DREAMMARK1
• AS17608 ABN
• AS10054 CMB Kwangju Broadcasting
• AS4637 Telstra Global
• AS38684 CMB Daejeon Broadcasting Co,.Ltd
• AS6939 Hurricane Electric LLC
• AS38661 abcle
• AS38133 CMB
• AS21859 Zenlayer Inc
• AS38680 CMB
• AS9781 GREEN CABLE TELEVISION STATION
• AS17583 Keumgang Cable Network
• AS9757 CMB DONDAEMOON BROADCASTING
• AS38387 CMB Sejong Broadcasting Co,.Ltd
• AS38673 Korea Cable TV Kwangju Broadcasting
• AS18168 CMB TAEGU BROADCAST SUSEONG
• AS139341 ACE
• AS45374 CCS
• AS38690 HyosungITX
• AS9957 KINX
• AS199524 G-Core Labs S.A.
• AS23908 IIAC

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Korea Internet Neutral Exchange KINX — Seoul, South Korea
• Equinix Internet Exchange Seoul — Seoul, South Korea