AS9525 DBFI-AS DB Securities Co.,Ltd.

AS9525 (DBFI-AS) is held by DB Securities Co., Ltd., a Seoul-based Korean brokerage and investment bank belonging to the DB Group. The firm traded as Dongbu Securities before the group rebranded to DB, and more recently as DB Financial Investment — the DBFI handle preserves that intermediate name.

What it's used for

A single-prefix corporate edge. RIS sees exactly 1 IPv4 prefix — 128.134.127.0/24, 256 addresses — no IPv6, and 1 observed neighbour. There is no ambiguity in that shape: one /24 behind one upstream is the internet-facing boundary of a financial firm, sized for public web and trading front ends and remote access. Everything that matters to a brokerage — order routing to the exchange, market-data feeds, back-office systems — runs on private circuits and internal address space, never on the routed /24.

The prefix itself is worth a second look: 128.134.0.0/16 is legacy class-B space long associated with Korean networks, and this /24 is a slice of it. Holding a piece of that range, plus a low four-digit AS number, means the firm has been multihomed in its own right since the early days of Korean commercial internet, even though the routed footprint has never needed to grow.

Notable

• The registry handle, the company name and the group brand all disagree with each other by a generation — a normal outcome for a long-lived registration through repeated corporate rebranding.
• One prefix, one neighbour, no IPv6: about as small as a routed enterprise presence gets while still justifying an AS number at all.
• The AS exists for address portability and multihoming capability rather than for scale.