User-Agent

Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

first seen 2026-06-11 07:17 · last seen 2026-09-16 11:46 · JSON

Bot verification

This User-Agent declares a bot or user-triggered fetcher. Each connection's IP is checked at ingest against the verification channels the operator publishes — its crawler IP ranges and, where documented, forward-confirmed reverse DNS. A claim either channel confirms is identified; one confirmed by neither — outside the ranges, inside a different operator's, or failing the DNS check — is an impersonation signal. Meta publishes its network rather than crawler ranges, so its identified claims are network-confirmed and its unconfirmed misses are unverified claims, not proven spoofs. bot-claim anomalies →

claims	identified	unconfirmed miss	wrong operator	unconfirmed rate
Googlebot	452	42	0	8.5%

Last 7 days (29 observations)

Distinct clients per day (last 30 days, peak 8/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 / client	`Googlebot 2.1`
Device class	`bot`
Declared URL	`http://www.google.com/bot.html`
Note	`inferred 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)

fingerprint	co-occurrences
`t13d181300_e8a523a41297_43ade6aba3df`	510
`t13d1011h1_61a7ad8aa9b6_3a8073edd8ef`	10
`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.	8
`t13d1312h2_f57a46bbacb6_ab7e3b40a677` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	5
`t13d1011h1_61a7ad8aa9b6_3fcd1a44f3e3`	5
`t13d131000_f57a46bbacb6_e7c285222651` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.	5
`t13d181100_85036bcba153_d41ae481755e`	4
`t13d521100_b262b3658495_8e6e362c5eac`	1
`t13d131100_f57a46bbacb6_ab7e3b40a677` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.	1
`t13i181200_e8a523a41297_43ade6aba3df`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn050000_c727097c2f59_000000000000_000000000000`	408
`ge11nn040000_be74ea4f9dce_000000000000_000000000000`	49
`ge11nn060000_1726a8486418_000000000000_000000000000`	39
`ge11nn050000_1e015d7f8561_000000000000_000000000000`	10
`ge11nn050000_2a235c4e94db_000000000000_000000000000`	5
`ge11nr04enus_3adac55f58e9_000000000000_000000000000`	5
`he11nr04enus_3adac55f58e9_000000000000_000000000000`	5
`ge20nn050000_857b5fa3405d_000000000000_000000000000`	4
`ge11nn030000_cd680697de12_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge11nr030000_cd680697de12_000000000000_000000000000`	3

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:16384;6:262144;1:65536\|1073741824\|0\|a,m,p,s`	7
`2:0;4:4194304;5:16384;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	6

TCP SYN (p0f)

fingerprint	co-occurrences
`4:121+7:0:1412:65535,8:mss,sok,ts,nop,ws::0`	450
`4:116+12:0:1412:65535,8:mss,sok,ts,nop,ws::0`	52
`4:58+6:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0`	7
`4:53+11:0:1380:65535,13:mss,sok,ts,nop,ws:df,id+:0`	6
`4:57+7:0:1420:mss*46,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:117+11:0:1412:65535,8:mss,sok,ts,nop,ws::0`	4
`4:55+9:0:1380:65535,13:mss,sok,ts,nop,ws:df,id+:0`	4
`4:118+10:0:1412:65535,8:mss,sok,ts,nop,ws::0`	3
`4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	3
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1412_8`	447
`65535_2-4-8-1-3_1380_13`	11
`65320_2-4-8-1-3_1420_10`	7
`64240_2-4-8-1-3_1460_7`	5
`42340_2-4-8-1-3_1460_12`	3
`65320_2-4-8-1-3_1420_7`	2
`64620_2-4-8-1-3_1436_7`	2
`65535_2-4-8-1-3_1460_10`	2
`65535_2-4-8-1-3_1436_10`	1
`64240_2-4-8-1-3_1460_10`	1

Country

fingerprint	co-occurrences
`US` · United States	523
`BE` · Belgium	12
`SG` · Singapore	9
`NL` · Netherlands	5
`DE` · Germany	1
`BR` · Brazil	1
`IR` · Iran	1
`LT` · Lithuania	1
`HR` · Croatia	1

Network (ASN)

fingerprint	co-occurrences
`AS15169` · Google LLC	511
`AS396982` · Google LLC	12
`AS13335` · Cloudflare, Inc.	11
`AS48090` · TECHOFF SRV LIMITED	4
`AS400529` · Infraly, LLC	3
`AS14061` · DigitalOcean, LLC	2
`AS8075` · Microsoft Corporation	1
`AS9009` · M247 Europe SRL	1
`AS212238` · Datacamp Limited	1
`AS204213` · Netmihan Communication Company Ltd	1