AS5671 — PBI-NET-BLK
AS5671 announces 2 IPv4 prefixes covering 8,448 addresses and 0 IPv6 prefixes.
About this network
PBI-NET-BLK is one of a pair of ASNs — with AS5672 — held by AT&T Enterprises, LLC. The handle is short for Pacific Bell Internet, the ISP arm of the California telco that was folded into SBC and then AT&T.
What it's used for
- Announcing legacy 198.225.0.0 space plus a block of dedicated-access addresses, which reverse-resolve under ded.swbell.net — the naming AT&T uses for dedicated business circuits rather than consumer lines.
Notable
- The address space serves AT&T's business customers, so this is closer to an enterprise-access network than to a residential eyeball one.
- Both AS5671 and AS5672 were registered to Pacific Bell in 1995 and were carried intact through the SBC and AT&T mergers, which is why two adjacent low ASNs share an identical name and organisation today.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 66.143.174.0/24
- 198.225.128.0/19
Upstream networks
Adjacent networks
BGP / ASN / CIDR
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IPv4
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IPv6
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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