TCP SYN (p0f)

4:49+15:0:1460:32768,10:mss,nop,ws,sok,ts::0

first seen 2026-07-25 12:30 · last seen 2026-10-30 12:08 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 24/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
MSS1460
Window size32768
Window scale10
Options layoutmss,nop,ws,sok,ts
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
t13d3113h2_e8f1e7e78f70_1b3407e2c93627
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.5
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.5
t13d1510h2_8daaf6152771_5603904660153
t13d1511h2_8daaf6152771_b11bb3600f943
t13d3013h2_1d37bd780c83_8537cf56674e2
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1512h2_8daaf6152771_cbb9361b6bf92
t13d1411h2_ec45a0f89deb_9ced094328c92
t13d1411h2_f4af447d284d_9ced094328c92

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_00000000000084
ge20nr020000_5594a17e7e7e_000000000000_00000000000025
ge20nr13engb_016d87568c43_000000000000_0000000000003
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nr030000_ff50983941c1_000000000000_0000000000002
ge20nn13engb_016d87568c43_000000000000_0000000000002
ge20nn11en00_3901d4197baf_000000000000_0000000000002
ge20nn12enus_a72b71f519fc_000000000000_0000000000001
ge20nn12enus_60f823d07c94_000000000000_0000000000001
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p84
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1, curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.27
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.4
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
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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s2
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 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1
2:0;4:4194304;3:100|10485760|1:0:0:255|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
32768_2-1-3-4-8_1460_10131

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.05
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36 Edg/152.0.0.04
Mozilla/5.0 (Linux; Android 7.0; MHA-L09) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Mobile Safari/537.364
Mozilla/5.0 (Linux; Android 5.1.1; SAMSUNG SM-G550FY Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/3.5 Chrome/38.0.2125.102 Mobile Safari/537.364
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; MRSPUTNIK 2, 4, 0, 460; GTB7.2; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)3
Mozilla/5.0 (Linux; Android 6.0.1; F-01J Build/V17R048B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.111 Mobile Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Safari/605.1.152
curl/8.18.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.362
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.2 Safari/537.362

Country

fingerprintco-occurrences
NL · Netherlands131

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology131

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,001814
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1