User-Agent

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

first seen 2026-06-15 20:21 · last seen 2026-10-31 01:36 · JSON

Last 7 days (54 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_8c06664c3ac5898
t12d210700_76e208dd3e22_2dae41c691ec3

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000401
ge11nn05en00_61812dc1cc58_000000000000_000000000000270
ge11nn06en00_3011d71998e2_000000000000_000000000000155
ge11nn030000_dd98166e0881_000000000000_00000000000046
ge11nn030000_341eb0d8946c_000000000000_00000000000013
ge11nn05en00_e3dbea9fc70c_000000000000_0000000000007
ge11nn040000_d368c19b6155_000000000000_0000000000006
ge11nn040000_cd25483f4169_000000000000_0000000000001
ge11nn040000_cabeb744284e_000000000000_0000000000001
ge10nn030000_dd98166e0881_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
6:49+15:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:096
6:49+15:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:089
4:45+19:0:1460:mss*44,7:mss,sok,ts,nop,ws::062
4:46+18:0:1460:65535,9:mss,nop,nop,sok,nop,ws::057
6:50+14:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:053
6:48+16:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:052
6:50+14:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:050
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:049
6:48+16:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:048
6:44+20:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:028

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_7309
64800_2-4-8-1-3_1440_10189
64240_2-4-8-1-3_1460_7119
65535_2-1-1-4-1-3_1440_971
65535_2-1-1-4-1-3_1460_957
65535_2-4-8-1-3_1440_930
64240_2-4-8-1-3_1460_820
42340_2-1-1-4-1-3_1460_1120
43200_2-1-1-4-1-3_1440_1113
65535_2-4-8-1-3_1460_912

Country

fingerprintco-occurrences
FR · France613
FI · Finland100
DE · Germany59
NO · Norway49
UA · Ukraine30
PL · Poland23
SG · Singapore9
HK · Hong Kong SAR China9
SE · Sweden4
AT · Austria3

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS575
AS24940 · Hetzner Online GmbH112
AS51167 · Contabo GmbH61
AS29695 · Lyse Tele AS37
AS197540 · netcup GmbH33
AS48230 · LLC MONOLITH.NET17
AS2119 · Telenor Norge AS12
AS6939 · Hurricane Electric LLC9
AS4760 · HKT Limited9
AS13188 · CONTENT DELIVERY NETWORK LTD8

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.54