AS206

AS206 is a low-numbered, legacy autonomous system registered under ARIN to DXC US Latin America Corporation, a U.S.-based subsidiary of the publicly traded IT-services firm DXC Technology Company (NYSE: DXC). Its ARIN handle, CSC-IGN-AMER-AS206, preserves the network's heritage: "CSC-IGN" denotes Computer Sciences Corporation's Internal Global Network, which folded into DXC after the 2017 merger of CSC with Hewlett Packard Enterprise's Enterprise Services arm. The ASN therefore predates DXC itself and continues to carry legacy naming. Operationally it is a small enterprise/corporate stub network rather than a transit or hosting provider: every routing source consulted agrees it originates four IPv4 prefixes totalling 8,704 addresses (20.132.176.0/20, 20.132.231.0/24, 20.132.248.0/24, 20.148.0.0/20 — all within Microsoft Azure's 20.x.x.x space), announces zero IPv6, and has a singleton customer cone (just itself). CAIDA ranks it 18,020th globally with two upstream providers and zero peers or customers, consistent with a closed enterprise WAN. RIS visibility is broad for v4 (326/327 peers) and absent for v6. The ARIN RDAP autnum top-level registration event dates the allocation to 1999-06-25, last changed 2021-12-13. RPKI posture is weak — no ROAs are registered, leaving all four prefixes RPKI-unsigned — though IRR status is Valid across the board. No notable public abuse signal was found as of June 2026: AS206 is absent from Spamhaus ASN-DROP, community ASN blacklists, and NANOG archives. Two routing-hygiene gaps stand out (no RPKI ROAs and a bogon prefix flagged by Hurricane Electric), but these are operational, not abuse indicators.

Operator

DXC US Latin America Corporation (subsidiary of DXC Technology Company, NYSE: DXC; ARIN handle CSC-IGN-AMER-AS206) [Confirmed] — ARIN RDAP autnum/206, ipinfo.io/AS206

Country / RIR

US, ARIN [Confirmed] — RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1999-06-25 (ARIN RDAP autnum top-level registration event, NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2021-12-13 [Confirmed] — ARIN RDAP autnum/206 top-level events

Org status

active; DXC Technology Company is a publicly traded corporation (NYSE: DXC); "DXC US Latin America Corporation" is the ARIN-registered legal entity; ARIN org address 20408 Bashan Dr, Ashburn, VA 20147 [Confirmed] — ARIN RDAP autnum/206, dxc.com/us/en/about-us

Contacts

abuse@dxc.com (DXC Security Incident Response Control Centre, +1-703-245-9675); ipaddr@dxc.com (NOC/technical, +1-800-524-7638) [Confirmed] — ARIN RDAP autnum/206, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-06-19 — absent from Spamhaus ASN-DROP, C0nw0nk community ASN blacklist, and NANOG archives; two routing-hygiene gaps (no RPKI ROAs; a bogon prefix flagged by Hurricane Electric); IPInfo tags at least one IP as VPN-associated. FraudGuard/AbuseIPDB ASN pages and Cloudflare Radar were inaccessible (404/403) and are Unknown [Confirmed for clean signal; Unknown for inaccessible sources] — spamhaus.org/drop/asndrop.json, bgp.he.net/AS206, github.com/C0nw0nk/ASN-BlackList

Network & routing

Network type

enterprise corporate WAN; legacy "CSC-IGN" = Computer Sciences Corporation Internal Global Network, folded into DXC after the 2017 CSC–HPE Enterprise Services merger; carries DXC's own traffic, not third-party transit/hosting

[Likely] — ARIN RDAP autnum/206, en.wikipedia.org/wiki/Computer_Sciences_Corporation, ipinfo.io/AS206

Size

4 IPv4 prefixes / 8,704 IPv4 addresses; 0 IPv6 prefixes; customer cone = 1 ASN (itself), 4 prefixes, 8,704 addresses [Confirmed] — RIPEstat routing-status / announced-prefixes, CAIDA AS Rank, bgp.he.net (2026-06)

Routing/peering

stub topology — CAIDA degree total 2 (customer 0, peer 0, provider 2); upstreams AS2688 (AT&T Enterprises LLC) and AS11271 (SENCINET LATAM BRASIL LTDA), with AS7018/AS3356 also reported by third-party DBs [Likely]; RIS visibility 326/327 v4 peers, 0/323 v6 [Confirmed]. No PeeringDB record (404); no public peering policy found — peering policy Unknown — peeringdb.com/asn/206, bgp.he.net/AS206

RPKI

no ROAs registered (RPKI-unsigned for all 4 prefixes); IRR status Valid across all 4 prefixes [Confirmed] — bgp.he.net/AS206

Notable usage

announces Microsoft Azure IP space (20.132.x / 20.148.x), suggesting DXC uses Azure-allocated addresses for managed-services or internal cloud infrastructure in the Americas; no domains hosted per IPInfo [Likely] — ipinfo.io/AS206

Announced prefixes (v4)

20.132.176.0/20, 20.132.231.0/24, 20.132.248.0/24, 20.148.0.0/20 — all within Microsoft Azure 20.x space [Confirmed] — RIPEstat announced-prefixes, bgp.he.net/AS206

Analyst note

legacy low-numbered ASN under a Fortune-500 IT-services operator; active stub network announcing Azure-range space with weak RPKI posture. Clean abuse profile; the "May 17, 2018" date from ipip.net is a third-party indexing artifact, not the ARIN registration — the authoritative RDAP date 1999-06-25 is used. Source A1 RDAP fetch timed out; A2/A3 independently confirmed the registration date directly from ARIN RDAP.