TCP SYN (p0f)

4:51+13:0:1452:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0

first seen 2026-07-01 15:27 · last seen 2026-10-22 17:35 · JSON

Distinct clients per day (last 30 days, peak 1/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 TTL51+13
Options length0
MSS1452
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf
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
t13d3613h1_bcee18a5b459_89ab6efea77323
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.6.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.9
t13d1314h2_f57a46bbacb6_e42f34c566123
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1712h1_ab0a1bf427ad_8e6e362c5eac2
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.1
t13d5911h1_a33745022dd6_1f22a2ca17c4 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 23.11.1.The fingerprint page shows the full measured match list. More on the catalog.1
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +9 more.The fingerprint page shows the full measured match list. More on the catalog.1
t12d3805h1_10ed599f3404_aaf95bb78ec91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06enus_21ea1759749c_000000000000_00000000000014
ge11nn050000_be0d0b335e46_000000000000_0000000000009
ge20nr07enus_0195bc40dc9f_000000000000_0000000000005
ge20nn07enus_39faa4ed05e7_000000000000_0000000000004
ge20nr08enus_0a5873f4dd2b_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
ge11nn05enus_91bf09848158_000000000000_0000000000002
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn07*000_4ae0f4a72b53_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 24.22.1, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn06en00_fb4afd1f380a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;3:100|10485760|1:0:0:255|m,s,p,a4
2:0;4:2097152;3:100|10485760|0|m,s,p,a3
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.1
2:0;4:2097152;3:100|10485760|7:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|9:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|11:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|13:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|5:0:0:255|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1452_643

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 14_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.1514
Mozilla/5.010
Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1 Brave9
Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1 GrokApp/1.4.243
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130 Safari/537.362
node1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
curl/8.7.11
Mozilla/5.0 (compatible; research)1
Mozilla/5.0 (compatible; WitaristResearchBot/1.0; +https://witarist.com)1

Country

fingerprintco-occurrences
TR · Turkey23
MA · Morocco12
IN · India5
ES · Spain2
BY · Belarus1

Network (ASN)

fingerprintco-occurrences
AS9121 · Turk Telekomunikasyon Anonim Sirketi23
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM12
AS24309 · Atria Convergence Technologies Pvt. Ltd. Broadband Internet Service Provider INDIA4
AS12430 · VODAFONE ESPANA S.A.U.2
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom1
AS133275 · Gigantic Infotel Pvt Ltd1

TLS supported groups

fingerprintco-occurrences
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