AS72

AS72 is a legacy allocation registered under ARIN to Schlumberger Limited (org SCHLU-3-Z, Houston, TX), the global oilfield-services and energy-technology corporation that rebranded its corporate identity to SLB on October 24, 2022. RFC 1020 (1987) labeled it "SCHLUMBERGER-AS / Schlumberger Laboratory for Computer Science," reflecting Schlumberger's early research-computing roots; the current holder is the same corporate lineage. Unlike most of its low-number neighbors, AS72 is actively announcing a large enterprise footprint: about 142 IPv4 prefixes (~1.15 million addresses) and no IPv6, present at two internet exchanges, with RPKI partial (four ROA-valid originations). A third-party tool (BigDataCloud) lists 264 registered prefixes, but that counts allocated rather than actively-announced space. The ARIN ASN RegDate is 1986-05-05 (the org RegDate of 2008-06-05 is a registry refresh). For triage this is a large, legitimate corporate network with many upstreams and IX presence. No notable public abuse signal was found as of June 2026.

Operator

Schlumberger Limited / SLB (ARIN OrgId SCHLU-3-Z, Houston, TX) [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1986-05-05 (org RegDate 2008-06-05 is a registry refresh) [Confirmed]

Org status

active

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-08 — bgp.he.net

Network & routing

Network type

enterprise (global oilfield-services / energy-technology; rebranded SLB 2022-10-24) [Confirmed]

Size

~142 IPv4 prefixes (~1.15M addresses), 0 IPv6; BigDataCloud's 264 counts allocated not announced — bgp.he.net (2026-06)

Routing/peering

actively announcing; present at 2 IXes; RPKI partial (4 ROA-valid) — bgp.he.net

Notable usage

[historical, RFC 1020] AS72 "SCHLUMBERGER-AS / Schlumberger Laboratory for Computer Science." [current] Schlumberger Limited / SLB, global enterprise network — slb.com

Related ASNs

none specifically confirmed for this profile

Analyst note

A large, legitimate corporate network with many upstreams and IX presence; actively announcing ~142 IPv4 prefixes.