AS773

AS773 is an active, low-visibility enterprise autonomous system registered to Parsons Corporation, a publicly traded engineering, national-security, and infrastructure-solutions firm; it currently originates two IPv4 /24 prefixes (512 addresses total) and no IPv6 space, and that announcement is fully visible across RIPE RIS peers (328/328).

ARIN RDAP records a first-party top-level registration event of 1990-11-09 for the autnum object, with a last-changed event of 2015-07-02 and status Active. The ARIN registrant is Parsons Corporation (org handle PCIP), headquartered at 100 W. Walnut Street, Pasadena, CA. No PeeringDB network record exists for AS773, and no public peering-policy page was found on parsons.com.

CAIDA ASRank places AS773 at global rank #48623 with a singleton customer cone (2 prefixes, 512 addresses) and a degree breakdown of 4 provider relationships, 0 peers, 0 customers. The observed upstreams read as commercial transit rather than settlement-free peering: Lumen/Level 3 (AS3356), Verizon Business/UUnet (AS701), Cox Communications (AS22773), and AT&T (AS7018) — a pattern consistent with a privately multi-homed enterprise network rather than an open network operator.

IPinfo classifies AS773 as network type "Business," with router locations described in Centreville and Huntsville, US, and a weekday, business-hours traffic rhythm. Combined with Parsons' business as a global engineering/national-security contractor, the most plausible read is that AS773 serves Parsons' own corporate and engineering-site IT connectivity rather than public transit or hosted content — an inference from third-party traffic-shape data, not a direct Parsons statement.

Operator

Parsons Corporation (ARIN org handle PCIP; publicly traded, NYSE: PSN) [Confirmed] — https://rdap.arin.net/registry/autnum/773

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/773

Allocated

1990-11-09 (ARIN RDAP autnum top-level registration event); last changed 2015-07-02 [Confirmed] — https://rdap.arin.net/registry/autnum/773

Org status

Active (ARIN RDAP status); Parsons Corporation is a publicly traded company (NYSE: PSN) [Confirmed] — https://rdap.arin.net/registry/autnum/773, https://finance.yahoo.com/quote/PSN/profile/

Contacts

Hostmaster@parsons.com; ARIN org handle PCIP, 100 W. Walnut Street, Pasadena, CA 91124; admin/tech/abuse contact handle HO35-ORG-ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/773

Security/abuse context (NEUTRAL, DATED)

no AS773-specific abuse signal found as of 2026-07-31 — not on the Spamhaus ASN-DROP list (checked directly), check.spamhaus.org query blocked (HTTP 403), and a NANOG mailing-list archive search returned zero matches [Confirmed absence-based] — https://www.spamhaus.org/drop/asndrop.json, https://check.spamhaus.org/query/ip/asn/773, https://www.mail-archive.com/search?l=nanog%40nanog.org&q=AS773

Network & routing

Network type

Enterprise/business network, not a transit ISP or content network; IPinfo classifies it "Business" [Likely] — https://ipinfo.io/AS773

Size

2 IPv4 /24 prefixes / 512 addresses; 0 IPv6; customer cone = 1 ASN (itself), 2 prefixes, 512 addresses [Confirmed] — https://asrank.caida.org/asns/773, https://stat.ripe.net/AS773

Routing/peering

NOT publicly peered — CAIDA asnDegree 4 provider / 0 peer / 0 customer relationships; RIPEstat observed_neighbours 4; no PeeringDB record; upstreams read as AS3356, AS701, AS22773, AS7018 [Confirmed for counts; Likely for the enterprise-multihomed characterization] — https://asrank.caida.org/asns/773, https://bgp.he.net/AS773, https://www.peeringdb.com/asn/773

RPKI

No covering ROA observed for either announced prefix — RIPEstat RPKI validation (routinator) returns status unknown with zero matching ROAs for both 206.219.240.0/24 and 206.219.241.0/24, as of 2026-07-31 [Confirmed] — RIPEstat rpki-validation

Notable usage

Likely serves Parsons Corporation's own corporate/engineering-site connectivity; IPinfo shows router locations in Centreville and Huntsville, US, with a weekday business-hours traffic pattern [Likely] — https://ipinfo.io/AS773, https://www.parsons.com/

Related ASNs

none found — ARIN RDAP for AS773 does not list related ASNs, and no source identifying sibling/affiliated ASNs for Parsons Corporation was found as of 2026-07-31 [Confirmed negative] — https://rdap.arin.net/registry/autnum/773

Analyst note

Small, stable enterprise ASN with no PeeringDB presence and transit-only upstreams. CAIDA's inferred geolocation (northeastern Tennessee) differs from the registrant mailing address (Pasadena, CA) — expected, since it reflects network-topology inference rather than the company's HQ, and is not treated as a discrepancy.