Network (ASN)

AS43037

first seen 2026-07-10 05:12 · last seen 2026-09-16 02:55 · JSON

Last 7 days (79 observations)

Distinct clients per day (last 30 days, peak 13/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

Network nameSeznam.cz, a.s.
Domainseznam.cz

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
t13d3112h1_1d947a95fc68_b72e173852fa425
t13d3112h1_1d947a95fc68_fa269c3d986d117

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07cscz_62ad33df7c0a_000000000000_000000000000330
ge11nn07cscz_d4021d63333c_000000000000_00000000000071
ge11nn06cscz_fcadf6bdaa82_000000000000_00000000000058
ge11nn06cscz_f604b96915d0_000000000000_00000000000054
ge11nn06cscz_a9e98b5c162a_000000000000_00000000000029

TCP SYN (p0f)

fingerprintco-occurrences
6:44+20:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0205
6:42+22:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0126
6:43+21:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:073
6:46+18:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:053
6:45+19:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:043
6:47+17:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:038
6:41+23:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:04

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_10542

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/)542

Country

fingerprintco-occurrences
CZ · Czechia542