USAS77
Operated by Johns Hopkins University Applied Physics Laboratory, US.
Summary
- // analyst note
- A live research/academic network; actively announcing 4 IPv4 prefixes with mainstream upstreams (Comcast/Lumen/HE). IPinfo's proprietary rank ~#33,088 is NOT CAIDA AS Rank. Org RegDate 2003-07-15 is a registry refresh, not the original 1986 assignment.
- // security note
- NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-08; clean research network.
About this ASN.
AS77 is a legacy allocation registered under ARIN to the Johns Hopkins University Applied Physics Laboratory (org JHUAPL, Laurel, MD), a University Affiliated Research Center (UARC) and division of Johns Hopkins University that performs national-security and space research and development. RFC 1166 (1990) lists it as "JHUAPL-AS / Johns Hopkins University," the same holder lineage; JHU/APL was founded in 1942 and is a major Department of Defense and NASA research lab. It is actively announcing four IPv4 prefixes (about 259 /24-equivalents of address space) and no IPv6, with upstreams Comcast (AS33657), Lumen/Level 3 (AS3356), and Hurricane Electric (AS6939) and roughly 32 peers — a live research/academic network. The ARIN ASN RegDate is 1986-05-05 (the org RegDate of 2003-07-15 is a registry refresh). Note that an IPinfo proprietary rank of about #33,088 is not the CAIDA AS Rank. For triage this is a clean, actively-routed research network. No notable public abuse signal was found as of June 2026.
- Operator
- Johns Hopkins University Applied Physics Laboratory (ARIN OrgId JHUAPL, Laurel, MD) [Confirmed] — ARIN RDAP
- Country / RIR
- US, ARIN [Confirmed]
- Allocated
- ARIN ASN RegDate 1986-05-05 (org RegDate 2003-07-15 is a registry refresh) [Confirmed]
- Org status
- active — jhuapl.edu
Security/abuse context (NEUTRAL, DATED)
no notable public abuse signal found as of 2026-06-08; clean research network — bgp.tools
Network & routing
- Network type
- FFRDC / research (UARC, division of Johns Hopkins University; national-security + space R&D; founded 1942) [Confirmed]
- Size
- 4 IPv4 prefixes (~259 /24-equivalents), 0 IPv6 — bgp.tools (2026-06)
- Routing/peering
- actively announcing; upstreams Comcast AS33657, Lumen AS3356, HE AS6939; ~32 peers; RPKI unknown — bgp.tools
- Notable usage
- [historical, RFC 1166] AS77 "JHUAPL-AS / Johns Hopkins University." [current] JHU/APL — major DoD/NASA research lab (founded 1942), a University Affiliated Research Center — jhuapl.edu
- Related ASNs
- none specifically confirmed for this profile (note IPinfo proprietary rank ~#33,088 is NOT CAIDA AS Rank)
- Analyst note
- A live research/academic network; actively announcing 4 IPv4 prefixes with mainstream upstreams (Comcast/Lumen/HE).
What this network routes.
- 128.244.0.0/16
- 204.9.128.0/24
- 204.9.130.0/24
Who it talks to.
Neighbours observed by RouteViews at 2026-09-20, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.
| ASN | Operator | Role |
|---|---|---|
| AS3356 | Level 3 Parent, LLC (Lumen Technologies) | upstream |
| AS6939 | Hurricane Electric LLC | upstream |
| AS293 | Energy Sciences Network (ESnet) | peer |
| AS5723 | — | peer |