User-Agent

curl/8.20.0

first seen 2026-06-18 14:20 · last seen 2026-09-02 19:02 · JSON

Distinct clients per day (last 30 days, peak 6/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientcurl 8.20.0
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d3013h2_1d37bd780c83_8537cf56674e23
t13d3012h2_1d37bd780c83_882d495ac381 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.21.0, curl 8.22.0, curl 8.20.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d9013h2_c6771aded2ed_57a60bdf03d12
t13d3513h2_bfa337485184_8d7351bd871b Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.1
t13d311100_e8f1e7e78f70_24695f2957a71

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.25
ge20nn030000_042112399351_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0.The fingerprint page shows the full measured match list. More on the catalog.3
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.28

TCP SYN (p0f)

fingerprintco-occurrences
6:121+7:0:1440:65535,8:mss,nop,ws,nop,nop,sok:flow:04
4:41+23:0:1412:mss*44,10:mss,sok,ts,nop,ws:df,id+:03
6:57+7:0:1440:mss*30,9:mss,sok,ts,nop,ws:flow:03
6:57+7:0:1440:65535,8:mss,sok,ts,nop,ws:flow:03
4:40+24:0:1412:mss*44,10:mss,sok,ts,nop,ws:df,id+:02
4:115+13:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:02
6:57+7:0:1440:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:02
6:46+18:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:01
6:47+17:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:01
4:48+16:0:1440:mss*44,10:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1412_105
65535_2-1-3-1-1-4_1440_85
43200_2-4-8-1-3_1440_93
65535_2-4-8-1-3_1440_83
64240_2-1-3-1-1-4_1460_82
65535_2-1-3-1-1-8-4-0-0_1440_62
64240_2-4-8-1-3_1452_101
64240_2-4-8-1-3_1460_101
65535_2-4-8-1-3_1400_81
65535_2-4-8-1-3_1344_101

Country

fingerprintco-occurrences
US · United States13
AE · United Arab Emirates5
CH · Switzerland2
CA · Canada2
AU · Australia1
DE · Germany1
RU · Russia1
PL · Poland1
ES · Spain1
CZ · Czechia1

Network (ASN)

fingerprintco-occurrences
AS393886 · Leaseweb USA, Inc.13
AS15802 · Emirates Integrated Telecommunications Company PJSC5
AS13030 · Init7 (Switzerland) Ltd.2
AS5769 · Videotron Ltee2
AS14061 · DigitalOcean, LLC1
AS5617 · Orange Polska Spolka Akcyjna1
AS47165 · Omskie kabelnye seti Ltd.1
AS3352 · TELEFONICA DE ESPANA S.A.U.1
AS4775 · Globe Telecoms1
AS13036 · T-Mobile Czech Republic a.s.1