TCP SYN (p0f)

4:43+21:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-25 16:32 · last seen 2026-11-01 00:37 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 2/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 TTL43+21
Options length0
MSS1410
Window sizemss*46
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
t13d1212h1_a538d02d76d5_f6eeaf393d2e84
t13d1011h2_61a7ad8aa9b6_f9531d972513 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-hyper 1.11.0, rust-hyper 1.11.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog.31
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.30
t13d3013h2_1d37bd780c83_8537cf56674e 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.2
t13d1213h1_a538d02d76d5_bdbfad5f08731

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06*000_9faab82a4eea_000000000000_00000000000083
ge11nr05zhcn_f3bb7aa45ec4_000000000000_00000000000017
ge20nn04*000_ded3c6d8f0eb_000000000000_00000000000010
ge11nn03zhcn_295e410d3834_000000000000_00000000000010
ge20nn04dede_3b20e5b1deac_000000000000_0000000000008
ge20nn04frfr_3b20e5b1deac_000000000000_0000000000007
ge11nn05zhcn_f3bb7aa45ec4_000000000000_0000000000003
ge20nn04dede_8325a3ce5a12_000000000000_0000000000003
ge11nn060000_0d5be15ec359_000000000000_0000000000002
ge20nn030000_bf75ddd0bb29_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.13.5, rust-reqwest 0.13.4, +4 more.The fingerprint page shows the full measured match list. More on the catalog.31
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, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_7144

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; DataForSeoBot/1.0; +https://dataforseo.com/dataforseo-bot)85
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.029
Mozilla/5.0 (compatible; Qwantbot/1.0; +https://help.qwant.com/bot/)15
curl/8.14.12
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.111
Mozilla/5.0 (compatible; Qwantbot/1.0_3000258; +https://help.qwant.com/bot/)1
Mozilla/5.0 (compatible; Qwantbot/1.0_3000198; +https://help.qwant.com/bot/)1
Mozilla/5.0 (compatible; Qwantbot/1.0_3000235; +https://help.qwant.com/bot/)1
Mozilla/5.0 (compatible; Qwantbot/1.0_3000303; +https://help.qwant.com/bot/)1
Mozilla/5.0 (compatible; Qwantbot/1.0_3000150; +https://help.qwant.com/bot/)1

Country

fingerprintco-occurrences
DE · Germany85
FR · France33
CN · China30

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH85
AS199064 · QWANT SAS31
AS141679 · China Telecom Beijing Tianjin Hebei Big Data Industry Park Branch30
AS16276 · OVH SAS2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.6
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.2
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1