TCP SYN (p0f)

4:46+18:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 00:16 · last seen 2026-08-05 09:50 · JSON

Decomposed attributes

IP version4
Initial TTL46+18
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
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.20
t13d190900_9dc949149365_97f8aa674fd95
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.4
t13d1516h2_8daaf6152771_e5627efa2ab11
t13d330900_80cecea31fe6_9da38b6fd1bc Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 1.8.0_492.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1312h2_f57a46bbacb6_ab7e3b40a677 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, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr100000_2bba053a5cb5_000000000000_00000000000015
ge20nn120000_3f1536a77ddc_000000000000_0000000000004
ge11nn030000_0db47b7d240d_000000000000_0000000000004
ge11nr05zhcn_f3bb7aa45ec4_000000000000_0000000000003
ge20nr120000_3f1536a77ddc_000000000000_0000000000001
ge11nn10enus_9673d335a071_000000000000_0000000000001
ge20nn10enus_9673d335a071_000000000000_0000000000001
ge11nr030000_0db47b7d240d_000000000000_0000000000001
ge20nn030000_ff50983941c1_000000000000_0000000000001
ge11nn03zhcn_295e410d3834_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.15
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.5
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1
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.1

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_75

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.5938.132 Safari/537.3620
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.365
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/120.0.0.04
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.361
MetaCrawler/1.0 (+https://metacrawler.com/bot)1

Country

fingerprintco-occurrences
US · United States27
CN · China4
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS3356 · Level 3 Parent, LLC27
AS141679 · China Telecom Beijing Tianjin Hebei Big Data Industry Park Branch4
AS24940 · Hetzner Online GmbH1