AS3738 — SSB-ASN-3738
AS3738 announces 56 IPv4 prefixes covering 27,136 addresses and 0 IPv6 prefixes.
About this network
The network of State Street Bank and Trust Company (SSB-ASN-3738), the Boston custody bank and asset servicer, registered in North Quincy, Massachusetts.
What it's used for
- Corporate and financial-services networking for State Street — internal systems, offices, and the connectivity behind its custody, trading, and asset-servicing platforms.
Notable
- Enterprise address space in a heavily regulated sector: the IPs serve one institution's own infrastructure and its counterparties, never consumers.
- The AS announces a large number of small prefixes (mostly /24s out of 192.250.0.0/16), the fine-grained slicing typical of a bank running many segregated networks and extranet connections.
Interesting
- State Street has held ARIN organisation records since the early 1990s — banks were among the first non-academic institutions to build serious IP networks, driven by market-data and interbank connectivity rather than the web.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 192.250.32.0/22
- 192.250.36.0/23
- 192.250.44.0/24
- 192.250.46.0/24
- 192.250.49.0/24
- 192.250.53.0/24
- 192.250.54.0/23
- 192.250.56.0/23
- 192.250.62.0/23
- 192.250.64.0/23
- 192.250.66.0/24
- 192.250.68.0/22
- 192.250.72.0/22
- 192.250.77.0/24
- 192.250.78.0/23
- 192.250.80.0/22
- 192.250.85.0/24
- 192.250.86.0/23
- 192.250.90.0/23
- 192.250.96.0/23
- 192.250.98.0/24
- 192.250.100.0/24
- 192.250.103.0/24
- 192.250.106.0/23
- 192.250.109.0/24
- 192.250.110.0/24
- 192.250.112.0/23
- 192.250.114.0/24
- 192.250.119.0/24
- 192.250.120.0/21
- 192.250.128.0/23
- 192.250.130.0/24
- 192.250.132.0/23
- 192.250.137.0/24
- 192.250.140.0/23
- 192.250.144.0/21
- 192.250.152.0/23
- 192.250.154.0/24
- 192.250.156.0/23
- 192.250.158.0/24
- 192.250.160.0/22
- 192.250.165.0/24
- 192.250.166.0/23
- 192.250.168.0/23
- 192.250.171.0/24
- 192.250.175.0/24
- 192.250.177.0/24
- 192.250.180.0/22
- 192.250.185.0/24
- 199.253.173.0/24
- 199.253.174.0/24
- 204.165.17.0/24
- 204.165.18.0/24
- 205.181.72.0/24
- 205.181.240.0/24
- 205.181.242.0/24
Upstream networks
- AS701 Verizon Business
- AS8220 COLT Technology Services Group Limited
- AS7018 AT&T Enterprises, LLC
- AS703 Verizon Business
- AS702 Verizon Business
- AS2687 AT&T Enterprises, LLC
- AS2764 AAPT Limited
- AS2856 British Telecommunications Limited
Adjacent networks
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IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED