TCP SYN (p0f)
4:111+17:0:1400:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0
first seen 2026-06-18 16:23 · last seen 2026-08-25 04:41 · 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 version | 4 |
|---|---|
| Initial TTL | 111+17 |
| Options length | 0 |
| MSS | 1400 |
| Window size | 65535 |
| Window scale | 8 |
| Options layout | mss,nop,ws,nop,nop,sok |
| 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_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t13d2014h2_a09f3c656075_14788d8d241b | 4 |
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. | 3 |
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d1714h2_5b57614c22b0_3dd24b5ebec4 | 2 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 2 |
t13d201200_2b729b4bf6f3_e24568c0d440 | 1 |
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 |
t13d591000_a33745022dd6_1f22a2ca17c4 | 1 |
t13d1513h2_8daaf6152771_eca864cca44a | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn030000_6dac75bd47eb_000000000000_000000000000 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. | 10 |
ge20nn040000_c3abebcf3d28_000000000000_000000000000 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. | 2 |
po11nn07arsa_7d361e250c48_000000000000_000000000000 | 1 |
ge20nn14enus_186438911b7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 149.0.7827.53, chrome 149.0.7827.155, chromium 149.0.7827.102, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn14zhcn_186438911b7e_000000000000_000000000000 | 1 |
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn10zhcn_881b70b330bb_000000000000_000000000000 | 1 |
ge20nr09zhcn_8f8de3cf47d0_000000000000_000000000000 | 1 |
ge20nn13zhcn_0c2c1d640f3e_000000000000_000000000000 | 1 |
ge20nr12zhcn_54b4638ab28b_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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:131072;5:16384;9:1|12517377|1:1:0:256|m,p,a,s | 2 |
4:4194304;3:100|10485760|1:1:0:256|m,s,p,a | 2 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 2 |
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. | 1 |
4:2097152;3:100|10485760|1:1:0:256|m,s,p,a | 1 |
4:16777216|16711681|0|m,p,a,s | 1 |
2:0;3:100;4:2097152;8:1;9:1|10420225|1:1:0:256|m,s,a,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-1-3-1-1-4_1400_8 | 18 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
EG · Egypt | 11 |
CN · China | 8 |
SE · Sweden | 1 |
SA · Saudi Arabia | 1 |
DZ · Algeria | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24863 · Link Egypt (Link.NET) | 11 |
AS4134 · CHINANET BACKBONE | 6 |
AS4837 · CHINA UNICOM China169 Backbone | 2 |
AS3301 · Telia Company AB | 1 |
AS35819 · Etihad Etisalat, a joint stock company | 1 |
AS36947 · Telecom Algeria | 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 |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 1 |
q13d0311h3_55b375c5d22e_5a1f323ef56d | 1 |