TCP SYN (p0f)

4:54+10:0:1360:mss*48,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-30 01:06 · last seen 2026-10-10 12:03 · 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 TTL54+10
Options length0
MSS1360
Window sizemss*48
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
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
t13i170900_5b57614c22b0_78e6aca7449b2
t12d130600_2d7513195f68_e51b7354d87f2
t13d191000_9dc949149365_e7c2852226511
t13d521100_b262b3658495_8e6e362c5eac1
t13d1410h2_9c3e8501550e_5603904660151
t13d1011h2_24460190e180_9ced094328c91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_0000000000002
ge20nn04enus_989c7cc05c9b_000000000000_0000000000002
ge11nr050000_a1c329e38462_000000000000_0000000000001
ge11nn070000_d0d63ed74832_000000000000_0000000000001
ge11nn050000_c71bbc472f37_000000000000_0000000000001
ge11nn07engb_71b742b5154a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p2

TCP SYN (JA4T)

fingerprintco-occurrences
65280_2-4-8-1-3_1360_78

User-Agent

fingerprintco-occurrences
Mozilla/5.0 zgrab/0.x2
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (compatible; The Lounge IRC Client; +https://github.com/thelounge/thelounge) facebookexternalhit/1.1 Twitterbot/1.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.1 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.1 Safari/537.36 Edg/134.0.0.11

Country

fingerprintco-occurrences
LT · Lithuania3
US · United States2
AU · Australia1
NL · Netherlands1
MY · Malaysia1

Network (ASN)

fingerprintco-occurrences
AS213790 · Limited Network LTD4
AS19318 · Interserver, Inc2
AS10143 · Exetel Pty Ltd1
AS55720 · Gigabit Hosting Sdn Bhd1