TCP SYN (p0f)
4:46+18:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-12 03:53 · last seen 2026-10-25 18:39 · JSON
Last 7 days (3 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 version | 4 |
|---|---|
| Initial TTL | 46+18 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*20 |
| Window scale | 7 |
| Options layout | mss,sok,ts,nop,ws |
| Quirks | df,id+ |
| Payload class | 0 |
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 |
|---|---|
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. | 316 |
t13d191000_9dc949149365_e7c285222651 | 15 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 13 |
t13d3013h2_1d37bd780c83_8537cf56674e | 7 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t12d990700_a40d17a72bcb_4446390ac224 | 4 |
t13d191100_9dc949149365_e5728521abd4 | 2 |
t13d521100_b262b3658495_8e6e362c5eac | 2 |
t13d3112h2_e8f1e7e78f70_8d633dac7124 Match?Exact match in Thumbprint's published controlled catalog captures: curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13i170900_5b57614c22b0_78e6aca7449b | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
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, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 316 |
ge11nr040000_e1d2031bdfea_000000000000_000000000000 | 17 |
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. | 10 |
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 7 |
ge11nn040000_08e7224bf8c7_000000000000_000000000000 | 4 |
ge11nn06zhcn_fb4afd1f380a_000000000000_000000000000 | 3 |
ge11nr030000_0db47b7d240d_000000000000_000000000000 | 2 |
ge11nn040000_e1d2031bdfea_000000000000_000000000000 | 2 |
ge20nn08enus_1945e0741196_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn07enus_71b742b5154a_000000000000_000000000000 | 2 |
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. | 317 |
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. | 7 |
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. | 2 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
2:0;3:100;4:2097152;8:1;9:1|10420225|1:0:0:256|m,s,a,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
29200_2-4-8-1-3_1460_7 | 367 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
CN · China | 341 |
US · United States | 7 |
DE · Germany | 6 |
NL · Netherlands | 4 |
FR · France | 4 |
KR · South Korea | 2 |
HK · Hong Kong SAR China | 2 |
GB · United Kingdom | 1 |
BE · Belgium | 1 |
ID · Indonesia | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS134420 · Chongqing Telecom | 312 |
AS58461 · CT HangZhou IDC | 19 |
AS8560 · IONOS SE | 6 |
AS399861 · Mobite Network LLC | 6 |
AS58519 · Cloud Computing Corporation | 6 |
AS197170 · TechTies Inc. | 4 |
AS12322 · Free SAS | 3 |
AS4134 · CHINANET BACKBONE | 2 |
AS932 · XNNET LLC | 2 |
AS9318 · SK Broadband Co Ltd | 2 |
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: php-guzzle 8.3.1, curl 7.88.1, curl 8.13.0, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
001d,0017,001e,0019,0018 | 2 |