TCP SYN (p0f)

4:47+17:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-20 17:59 · last seen 2026-09-15 03:21 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/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

IP version4
Initial TTL47+17
Options length0
MSS1460
Window sizemss*20
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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
t13d5911h1_a33745022dd6_1f22a2ca17c4 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 23.11.1.The fingerprint page shows the full measured match list. More on the catalog.7
t13i1909h2_9dc949149365_97f8aa674fd92
t13i170900_5b57614c22b0_78e6aca7449b2
t13i1712h1_ab0a1bf427ad_ecd0401ec68b1
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1313h2_f57a46bbacb6_9249cab70c771

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07*000_2f91038604b7_000000000000_0000000000007
ge20nr040000_be74ea4f9dce_000000000000_0000000000001
ge20nr040000_88d30a62b7ad_000000000000_0000000000001
ge20nn040000_c3abebcf3d28_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1
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.1
ge11nn070000_ca40d4d1460e_000000000000_0000000000001
ge11nn050000_889622e8388c_000000000000_0000000000001
ge20nr020000_fb4f949fd323_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_711

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.367
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.361
python-httpx/0.28.11
curl/8.7.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/72.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 13_6_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.124 Safari/537.361

Country

fingerprintco-occurrences
LT · Lithuania7
US · United States4
LY · Libya2
RU · Russia1

Network (ASN)

fingerprintco-occurrences
AS21412 · UAB Cgates7
AS14061 · DigitalOcean, LLC2
AS37284 · Aljeel Aljadeed For Technology2
AS50340 · JSC Selectel1
AS20115 · Charter Communications LLC1
AS399861 · Mobite Network LLC1