User-Agent

Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)

first seen 2026-06-15 20:21 · last seen 2026-09-15 20:55 · JSON

Last 7 days (141 observations)

Distinct clients per day (last 30 days, peak 14/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

Browser / clientMJ12bot v1.4.8
Device classbot
Declared URLhttp://mj12bot.com/
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

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
t12d290700_fc2078a0b8c0_8c06664c3ac5513
t12d210700_76e208dd3e22_2dae41c691ec1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000219
ge11nn05en00_61812dc1cc58_000000000000_000000000000149
ge11nn06en00_3011d71998e2_000000000000_00000000000076
ge11nn030000_dd98166e0881_000000000000_00000000000043
ge11nn030000_341eb0d8946c_000000000000_00000000000013
ge11nn05en00_e3dbea9fc70c_000000000000_0000000000007
ge11nn040000_d368c19b6155_000000000000_0000000000006
ge11nn040000_cd25483f4169_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1460:mss*44,7:mss,sok,ts,nop,ws::055
6:49+15:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:054
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:049
6:48+16:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:040
6:50+14:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:029
6:44+20:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:028
4:46+18:0:1460:65535,9:mss,nop,nop,sok,nop,ws::020
6:47+17:0:1440:65535,9:mss,sok,ts,nop,ws:ecn,flow:016
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws::015
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws::013

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_7225
64240_2-4-8-1-3_1460_796
65535_2-1-1-4-1-3_1440_941
65535_2-4-8-1-3_1440_924
65535_2-1-1-4-1-3_1460_920
64240_2-4-8-1-3_1460_818
64800_2-4-8-1-3_1440_1015
42340_2-1-1-4-1-3_1460_1114
65535_2-4-8-1-3_1460_912
64952_2-4-8-1-3_1412_106

Country

fingerprintco-occurrences
FR · France330
FI · Finland54
NO · Norway39
DE · Germany33
UA · Ukraine21
PL · Poland15
HK · Hong Kong SAR China9
SG · Singapore6
SE · Sweden4
AT · Austria3

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS309
AS24940 · Hetzner Online GmbH64
AS51167 · Contabo GmbH36
AS29695 · Lyse Tele AS32
AS197540 · netcup GmbH14
AS48230 · LLC MONOLITH.NET12
AS4760 · HKT Limited9
AS2119 · Telenor Norge AS7
AS13188 · CONTENT DELIVERY NETWORK LTD7
AS6939 · Hurricane Electric LLC6