TCP SYN (JA4T)
64860_2-1-3-1-1-4_1380_8
first seen 2026-07-14 16:18 · last seen 2026-10-24 04:26 · 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
| TCP window | 64860 |
|---|---|
| Option kinds | 2-1-3-1-1-4 |
| MSS | 1380 |
| Window scale | 8 |
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)
| fingerprint | co-occurrences |
|---|---|
t13d2913h1_723694b0fccc_5671b5df5029 | 8 |
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. | 6 |
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. | 4 |
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. | 4 |
t13d181100_85036bcba153_d41ae481755e | 3 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 2 |
t13d1712h1_ab0a1bf427ad_882d495ac381 | 2 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t12d180700_4b22cbed5bed_2dae41c691ec | 1 |
t12d210700_76e208dd3e22_f28add8e7af0 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr10eses_b3034183f430_000000000000_000000000000 | 4 |
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn040000_5b1e8b5f4d2d_000000000000_000000000000 | 2 |
ge20nr12ruru_54b4638ab28b_000000000000_000000000000 | 2 |
ge11nr08enus_33cbba219825_000000000000_000000000000 | 2 |
ge11nr11enus_835281d8e5d9_000000000000_000000000000 | 2 |
ge11nr11frfr_835281d8e5d9_000000000000_000000000000 | 2 |
ge20cn13eses_0c2c1d640f3e_c00282046cf0_b32455b616e7 | 2 |
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge11nn050000_2469c960a647_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-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, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
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. | 3 |
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. | 2 |
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. | 2 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +12 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
CU · Cuba | 11 |
FR · France | 7 |
US · United States | 5 |
CA · Canada | 3 |
RU · Russia | 2 |
AR · Argentina | 2 |
NL · Netherlands | 1 |
JP · Japan | 1 |
BE · Belgium | 1 |
UA · Ukraine | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS27725 · Empresa de Telecomunicaciones de Cuba, S.A. | 11 |
AS12322 · Free SAS | 5 |
AS852 · TELUS Communications Inc. | 3 |
AS33363 · Charter Communications, Inc | 3 |
AS16509 · Amazon.com, Inc. | 2 |
AS205467 · Base IP B.V. | 2 |
AS34959 · PROCLOUD MSK | 2 |
AS21859 · Zenlayer Inc | 1 |
AS396356 · Latitude.sh | 1 |
AS6848 · Telenet BV | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0315h3_55b375c5d22e_dc5437974b47 | 2 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 2 |