AS293

AS293 is an active autonomous system number registered under ARIN to the Energy Sciences Network (ESnet), the U.S. Department of Energy's high-performance science network. ESnet is funded by the DOE Office of Science and operationally stewarded by Lawrence Berkeley National Laboratory; it is a federal research-and-education (R&E) facility, not a commercial carrier. The network was created in 1986 by combining two earlier DOE networking projects (HEPnet and MFEnet), and the AS293 ASN was registered with ARIN on 1997-06-16 (last changed 2012-04-02). ESnet serves DOE's 17 national laboratories and 28 user facilities, connects to 270+ research and commercial networks worldwide, and moves on the order of 150 petabytes of scientific data per month; its current ESnet6 generation delivers tens of Tbps of aggregate backbone capacity. CAIDA marks AS293 as a clique member (transit-free core peer) with an AS rank of 925, a degree of 773 (41 customers, 727 peers, 5 providers), and a customer cone of 41 ASNs / 265 prefixes / ~3.44M addresses. RIPEstat shows the ASN announcing 27 IPv4 prefixes (~140K addresses) and 2 IPv6 prefixes, seen by 100% of RIS peers (325/325 v4, 323/323 v6), first observed in routing in August 2000 and still active. ESnet runs a Selective, security-forward peering policy: IPv4-only sessions are no longer accepted (sessions must be IPv6 or dual-stack), RPKI-invalid prefixes are rejected, and MANRS compliance is required. No notable public abuse signal was found as of 2026-06-25 — no spam listings, malware hosting, BGP hijacks, or CISA advisories naming AS293. The only notable public BGP event on record is a 2011 commercial peering dispute with Cogent, not a security incident.

Operator

Energy Sciences Network (ESnet), stewarded by Lawrence Berkeley National Laboratory for the U.S. DOE Office of Science [Confirmed] — ARIN RDAP autnum/293, es.net/about

Country / RIR

US, ARIN [Confirmed] — RIPEstat as-overview (block "Assigned by ARIN"), abuse-contact-finder (authoritative_rir: arin)

Allocated

1997-06-16 (ARIN registry date from autnum top-level registration event, NOT an IEEE date); last changed 2012-04-02 [Confirmed] — ARIN RDAP autnum/293 top-level events

Org status

U.S. federal government research facility funded by DOE Office of Science, operationally managed by Lawrence Berkeley National Laboratory (a DOE national lab); ESnet created 1986 from HEPnet + MFEnet

[Confirmed] — es.net/about, science.osti.gov/ascr/Facilities/User-Facilities/ESnet, en.wikipedia.org/wiki/Energy_Sciences_Network

Contacts

hostmaster@es.net (abuse); peering@es.net (peering); trouble@es.net (24x7 NOC); HQ 1 Cyclotron Road MS 59R3103, Berkeley, CA 94720 [Confirmed for abuse via RIPEstat; Confirmed for peering/NOC via es.net peering page]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-25 — no spam/blocklist listings, malware hosting, BGP hijacks, or CISA advisories naming AS293; AUP explicitly restricts traffic to DOE mission use. Only notable public BGP event is a 2011 Cogent peering dispute (commercial, not a security incident) [Confirmed for absence-of-signal as dated; Likely for federal posture] — es.net/about/governance/AUP, mailman.nanog.org/pipermail/nanog/2011-June/037735.html, first.org/members/teams/lawrence_berkeley_national_lab

Network & routing

Network type

U.S. federal research/education (R&E) network and NSP; not a commercial entity [Confirmed] — es.net/about, peeringdb.com/asn/293

Size

announces 27 IPv4 prefixes (~140,288 addresses) and 2 IPv6 prefixes; customer cone 41 ASNs / 265 prefixes / ~3,441,040 addresses [Confirmed] — RIPEstat routing-status, CAIDA AS Rank

Routing/peering

visible to 100% of RIS peers (325/325 v4, 323/323 v6); CAIDA degree total 773 (41 customers, 727 peers, 5 providers); clique member (transit-free core); first seen 2000-08-18, last seen 2026-06-26 [Confirmed] — RIPEstat routing-status, CAIDA AS Rank. Selective peering policy: PNI-preferred, IPv6/dual-stack required (IPv4-only deprecated), RPKI-invalids rejected, MANRS required, 100G min (400G preferred)

[Confirmed] — es.net/engineering-services/the-network/peering-connections, peeringdb.com/asn/293

RPKI

posture not confirmed from available data — RIPEstat rpki-validation was skipped (no prefix supplied); ESnet's published peering policy states it rejects RPKI-invalid prefixes [Unknown for AS293's own ROAs; Likely for the inbound-reject policy] — es.net/engineering-services/the-network/peering-connections

Notable usage

serves DOE's 17 national laboratories and 28 user facilities, connects to 270+ networks globally, moves ~150 PB/month of scientific data; ESnet6 delivers tens of Tbps aggregate backbone [Confirmed] — es.net/about, newscenter.lbl.gov/2022/10/11/esnet-launches-next-generation-network

Geo footprint

US-headquartered (Lawrence Berkeley National Laboratory, Berkeley CA 94720); international interconnects in UK, Switzerland, Netherlands [Confirmed] — ARIN RDAP autnum/293, CAIDA AS Rank, peeringdb.com/asn/293

IXP presence

peers at AMS-IX, DE-CIX New York, multiple Equinix metros (IAD, CHI, DAL, SJC), Pacific Wave, SIX Seattle, MASS-IX; ~24 interconnection facilities across NA, UK, CH, NL [Likely] — peeringdb.com/asn/293

Analyst note

Active, well-established federal R&E ASN; CAIDA clique membership and 727 peers confirm transit-free core status. Some v4 prefixes are announced as overlapping more-specifics (e.g. 192.124.52.0/22 alongside 192.124.52.0/24), consistent with traffic-engineering deaggregation.