TCP SYN (p0f)

4:49+15:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-13 06:39 · last seen 2026-09-10 14:56 · JSON

Last 7 days (5 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 TTL49+15
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_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog.24
t13d190900_9dc949149365_97f8aa674fd910
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.6
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.4
t13d1516h2_8daaf6152771_e5627efa2ab13
t13d371100_db35923f8641_fa269c3d986d2
t13d361000_bcee18a5b459_c3976d2688531

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr10enus_00ecf112ab34_000000000000_00000000000017
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.6
ge20nr090000_066de640a584_000000000000_0000000000005
ge20nr12enus_f877544e67f2_000000000000_0000000000005
ge11nn11enus_bf0046cf26b3_000000000000_0000000000004
ge11nr030000_cd680697de12_000000000000_0000000000004
ge20nn09enus_a545420ec371_000000000000_0000000000003
ge11nn07enus_4222c6ea4e8a_000000000000_0000000000002
ge11nn030000_58c83775e1a3_000000000000_0000000000001
ge20nr100000_3a59a3b24d6e_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.12
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.6
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.6
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.4
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p3
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:220|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_749

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/537.3626
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.3610
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.12
OI-Crawler/Nutch (https://openintel.nl/webcrawl/)2
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2)1
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/127.0.6533.119 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/150.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States47
NL · Netherlands2
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS3356 · Level 3 Parent, LLC47
AS1133 · University Twente2
AS42708 · Glesys AB1