AS27390 — ALGAS

AS27390 announces 2 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The AS handle ALGAS is held by Fred Alger & Co.

What it's used for

• The address space carries corporate infrastructure for a financial services firm, evidenced by the registrant Fred Alger & Co and reverse DNS entries pointing to oainc.net.
• The AS announces 512 IPv4 addresses across 2 prefixes with 3 observed neighbours, indicating a small-scale internal corporate estate rather than a transit or access network.

Notable

• Registrants do not fully agree with the announcer; one prefix is registered to Cogent Communications, LLC while the other is registered to Fred Alger & Co.
• The address inventory consists of two /24 blocks, one of which appears to be leased or historically associated with Cogent, while the other is directly owned by the financial firm.

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

Announced prefixes

• 38.76.33.0/24
• 66.206.123.0/24

Upstream networks

• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS174 Cogent Communications, LLC
• AS36086 Telx

Adjacent networks

• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS174 Cogent Communications, LLC
• AS36086 Telx

Routing security

• RPKI: 0 valid, 0 invalid and 2 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS-EC-PH, AS-TELX, AS-TELX, AS-TELX-NYC, AS-XO-B, AS16657:AS-CUST, AS6128:AS-CUSTOMERS.