JA4 t12d990700_a40d17a72bcb_b84f7053a7d6

t12d990700_a40d17a72bcb_b84f7053a7d6

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.2

Server name

server name sent

Cipher suites offered

99

Extensions offered

7

ALPN

none offered

Same tool, different options

These 1 other fingerprints share this one's JA4_c — the extension and signature-algorithm hash. A client that keeps its extension set constant while varying its cipher list produces exactly this pattern, which is what a scanner iterating cipher suites looks like. A JA3 cannot show you this: its single MD5 collapses ciphers and extensions together, so every variation looks like an unrelated client.

• t12d610700_8a10cb45a794_b84f7053a7d6

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 109

• TLS_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_RC4_128_MD5
• 2 (0x0002)
• 1 (0x0001)
• TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA
• 58 (0x003a)
• 24 (0x0018)
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_3DES_EDE_CBC_SHA
• 27 (0x001b)
• TLS_RSA_WITH_AES_128_CBC_SHA
• 52 (0x0034)
• 49168 (0xc010)
• 49158 (0xc006)
• 49173 (0xc015)
• 49163 (0xc00b)
• 49153 (0xc001)
• 59 (0x003b)
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• 165 (0x00a5)
• 163 (0x00a3)
• 161 (0x00a1)
• TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
• 106 (0x006a)
• 105 (0x0069)
• 104 (0x0068)
• 56 (0x0038)
• 55 (0x0037)
• 54 (0x0036)
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
• 135 (0x0087)
• 134 (0x0086)
• 133 (0x0085)
• 49177 (0xc019)
• 167 (0x00a7)
• 109 (0x006d)
• 137 (0x0089)
• 49202 (0xc032)
• 49198 (0xc02e)
• 49194 (0xc02a)
• 49190 (0xc026)
• 49167 (0xc00f)
• 49157 (0xc005)
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• 164 (0x00a4)
• 162 (0x00a2)
• 160 (0x00a0)
• TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
• 64 (0x0040)
• 63 (0x003f)
• 62 (0x003e)
• 50 (0x0032)
• 49 (0x0031)
• 48 (0x0030)
• TLS_DHE_RSA_WITH_SEED_CBC_SHA
• 153 (0x0099)
• 152 (0x0098)
• 151 (0x0097)
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
• 68 (0x0044)
• 67 (0x0043)
• 66 (0x0042)
• 49176 (0xc018)
• 166 (0x00a6)
• 108 (0x006c)
• 155 (0x009b)
• 70 (0x0046)
• 49201 (0xc031)
• 49197 (0xc02d)
• 49193 (0xc029)
• 49189 (0xc025)
• 49166 (0xc00e)
• 49156 (0xc004)
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_SEED_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
• 7 (0x0007)
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• 49174 (0xc016)
• 49164 (0xc00c)
• 49154 (0xc002)
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
• 19 (0x0013)
• 16 (0x0010)
• 13 (0x000d)
• 49175 (0xc017)
• 49165 (0xc00d)
• 49155 (0xc003)
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 7

• server_name
• ec_point_formats
• supported_groups
• session_ticket
• signature_algorithms
• heartbeat
• padding

Named groups 13

• secp256r1
• secp521r1
• 28 (0x001c)
• 27 (0x001b)
• secp384r1
• 26 (0x001a)
• 22 (0x0016)
• 14 (0x000e)
• 13 (0x000d)
• 11 (0x000b)
• 12 (0x000c)
• 9 (0x0009)
• 10 (0x000a)

Point formats 3

• uncompressed
• ansiX962_compressed_prime
• ansiX962_compressed_char2

771,5-4-2-1-22-51-57-58-24-53-10-27-47-52-49168-49158-49173-49163-49153-59-49200-49196-49192-49188-49172-49162-165-163-161-159-107-106-105-104-56-55-54-136-135-134-133-49177-167-109-137-49202-49198-49194-49190-49167-49157-157-61-132-49199-49195-49191-49187-49171-49161-164-162-160-158-103-64-63-62-50-49-48-154-153-152-151-69-68-67-66-49176-166-108-155-70-49201-49197-49193-49189-49166-49156-156-60-150-65-7-49169-49159-49174-49164-49154-49170-49160-19-16-13-49175-49165-49155-255,0-11-10-35-13-15-21,23-25-28-27-24-26-22-14-13-11-12-9-10,0-1-2

Seen in live traffic

Connections

2

First seen

2026-08-26 07:26 UTC

Last seen

2026-08-26 07:26 UTC

Transport

TCP

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.