Port 20057AvesTerra Hypergraph Transfer Protocol (HGTP)

TCP port 20057 is assigned to AvesTerra Hypergraph Transfer Protocol (HGTP), associated with Georgetown University.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as HGTP

Technical Details

what runs on :20057

AvesTerra Hypergraph Transfer Protocol (HGTP) is registered on port :20057 over tcp to Georgetown University, assigned June 2016. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :20057

this machine

# linux
sudo ss -tlpn 'sport = :20057'

# macos / bsd
sudo lsof -nP -i :20057

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :20057

another host

nmap -sV -p T:20057 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :20057

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :20057 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :20057
service: AvesTerra Hypergraph Transfer Protocol (HGTP)
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA assignment identifies this port as AvesTerra Hypergraph Transfer Protocol (HGTP) and lists Georgetown University as the registrant. No broader or independently established deployment is known.
lookups: 0rank 993
added: 2026-10-18
updated: 2026-10-18
references: IANA service name registry — port 20057

Something wrong?

This record is maintained by the engineers who use port 20057. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-18.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :20057, by lookups.

port	service	proto	category	risk	views
:20000	DNP3		Network Services	caution	13.6k
:19999	DNP3 Secure		Security	caution	12.0k
:20000	Usermin User Tool		Web Services	caution	8.9k
:20014	DART Reporting Server	TCP	Security	caution	6.8k
:20002	Commtact HTTP	TCPUDP	Web Services	safe	0
:20001	MicroSAN	TCPUDP	—	safe	0
:20005	BTicino OpenWebNet	TCPUDP	IoT	risk	0
:19998	Secure IEC 60870-5-104	TCPtls	Security	risk	0

risk mix of the 8 listed

safe25%
caution50%
risk25%

1 of 8 encrypted

Port :20057AvesTerra Hypergraph Transfer Protocol (HGTP)

Technical Details

Security Information

Related Ports

Port 20057AvesTerra Hypergraph Transfer Protocol (HGTP)