This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402603
IANA has recorded AS3999 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS3999\n
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 3999
ASName: PENN-STATE
ASHandle: AS3999
RegDate: 1994-11-04
Updated: 2012-02-24
Ref: https://rdap.arin.net/registry/autnum/3999
OrgName: The Pennsylvania State University
OrgId: PSU-2
Address: 105 USB 2
City: University Park
StateProv: PA
PostalCode: 16802
Country: US
RegDate: 1986-03-31
Updated: 2026-05-18
Ref: https://rdap.arin.net/registry/entity/PSU-2
OrgDNSHandle: REESE192-ARIN
OrgDNSName: Reese, Walter
OrgDNSPhone: +1-814-865-2404
OrgDNSEmail: wjr14@psu.edu
OrgDNSRef: https://rdap.arin.net/registry/entity/REESE192-ARIN
OrgTechHandle: APTP-ARIN
OrgTechName: ARIN PSU Technical POC
OrgTechPhone: +1-814-863-0859
OrgTechEmail: ip-tech@psu.edu
OrgTechRef: https://rdap.arin.net/registry/entity/APTP-ARIN
OrgTechHandle: ADMIN8570-ARIN
OrgTechName: Admin POC
OrgTechPhone: +1-717-683-6803
OrgTechEmail: aca111@psu.edu
OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN8570-ARIN
OrgTechHandle: PRICE619-ARIN
OrgTechName: Price, Justin
OrgTechPhone: +1-814-865-2043
OrgTechEmail: jpp11@psu.edu
OrgTechRef: https://rdap.arin.net/registry/entity/PRICE619-ARIN
OrgTechHandle: TTL2-ARIN
OrgTechName: Long, Tom Tom
OrgTechPhone: +1-814-880-1622
OrgTechEmail: tgl3@psu.edu
OrgTechRef: https://rdap.arin.net/registry/entity/TTL2-ARIN
OrgAbuseHandle: OIS6-ARIN
OrgAbuseName: Office of Information Security
OrgAbusePhone: +1-814-863-7804
OrgAbuseEmail: abuse@psu.edu
OrgAbuseRef: https://rdap.arin.net/registry/entity/OIS6-ARIN
OrgNOCHandle: NOC1840-ARIN
OrgNOCName: Network Operations Center
OrgNOCPhone: +1-814-865-4662
OrgNOCEmail: NOC@psu.edu
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC1840-ARIN
OrgDNSHandle: BILLE36-ARIN
OrgDNSName: Biller, Brian
OrgDNSPhone: +1-814-865-2270
OrgDNSEmail: bjb256@psu.edu
OrgDNSRef: https://rdap.arin.net/registry/entity/BILLE36-ARIN
OrgNOCHandle: TTL2-ARIN
OrgNOCName: Long, Tom Tom
OrgNOCPhone: +1-814-880-1622
OrgNOCEmail: tgl3@psu.edu
OrgNOCRef: https://rdap.arin.net/registry/entity/TTL2-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#