TCP SYN (p0f)

4:111+17:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-11 20:57 · last seen 2026-09-12 11:34 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 7/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 TTL111+17
Options length0
MSS1440
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d1518h2_8daaf6152771_e2d80978ab2e Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +4 more.The fingerprint page shows the full measured match list. More on the catalog.147
t13d201100_2b729b4bf6f3_36bf25f296df124
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.58
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +4 more.The fingerprint page shows the full measured match list. More on the catalog.17
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.9
t13d1516h1_8daaf6152771_d8a2da3f94cd8
t13d1812h1_85036bcba153_b26ce05bbdd62
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d201200_2b729b4bf6f3_e24568c0d4401
t13d2913h1_723694b0fccc_5671b5df50291

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn16enus_a27292610b04_000000000000_00000000000091
ge11nn010000_4a823118b9ba_000000000000_00000000000017
ge11nn010000_4740ae6347b0_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.0, rust-hyper 1.11.1, rust-hyper 1.10.1.The fingerprint page shows the full measured match list. More on the catalog.12
ge11nn16enus_35f3f038964b_000000000000_0000000000002
ge11nn15enus_35372a7bda31_000000000000_0000000000002
ge11nr13zhcn_91857df34c2b_000000000000_0000000000002
ge11nn14zhcn_535d0194b751_000000000000_0000000000002
po11nn060000_7ba2d3693069_000000000000_0000000000001
he11nn050000_b223a0ebb0b5_000000000000_0000000000001
ge20nr13enau_9e2b86631664_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.51
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, +42 more.The fingerprint page shows the full measured match list. More on the catalog.21
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p13
1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p13
1:65536;2:0;4:6291456;6:262144|15663105|9:0:0:256|m,a,s,p8
1:65536;2:0;4:6291456;6:262144|15663105|13:0:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|21:0:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|5:0:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|17:0:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|25:0:0:256|m,a,s,p6

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_8351

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36237
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.3695
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.361
python-requests/2.32.41
Mozilla/5.0 (Android 13; Mobile; rv:153.0) Gecko/153.0 Firefox/153.01
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 OPR/135.0.0.01
Mozilla/5.0 (Windows NT 6.2; x64) AppleWebKit/537.36 (KHTML, like Gecko) Opera/66.0.0.0 Safari/537.361
Mozilla/5.0 (iPad; CPU OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
CN · China237
CA · Canada80
US · United States30
CH · Switzerland7
SG · Singapore4
HK · Hong Kong SAR China4
IT · Italy2
BR · Brazil2
AU · Australia1
VN · Vietnam1

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE237
AS8075 · Microsoft Corporation126
AS1267 · WIND TRE S.P.A.2
AS7545 · TPG Telecom Limited1
AS18403 · FPT Telecom Company1
AS52768 · Alsol Provedor de Internet Ltda1
AS28649 · Desktop Sigmanet Comunicação Multimídia SA1