regex101: PCRE (Legacy) Match Workspace

Group ip(?<ip>(?:[0-9]{1,3}\.){3}[0-9]{1,3})

Non-Capturing Group(?:[0-9]{1,3}\.){3}

{3}repeats the group contents below exactly 3 times:

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[\s,]

\sany whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

25 tokens

Regular Expression

(?<ip>(?:[0-9]{1,3}\.){3}[0-9]{1,3})[\s,]

New

"166.78.66.241" 70.121.107.109 "70.121.107.109" - - [19/Jan/2018:12:24:33 -0600] "POST /fileUpload/image HTTP/1.1" 200 - 137895 214 UCT-556540 "-" "-" "-"

 10.210.192.15 - - [19/Jan/2018:11:00:22 -0500] "POST /fileUpload/image HTTP/1.1" 200 - "-" "-"
 
 27.127.175.202, 192.168.10.101 - - [19/Jan/2018:08:59:53 +0900] "POST /fileUpload/image HTTP/1.1" 200 - "-" "-"

Extraction

"166.78.66.241" 70.121.107.109 "70.121.107.109" - - [19/Jan/2018:12:24:33 -0600] "POST /fileUpload/image HTTP/1.1" 200 - 137895 214 UCT-556540 "-" "-" "-"

 10.210.192.15 - - [19/Jan/2018:11:00:22 -0500] "POST /fileUpload/image HTTP/1.1" 200 - "-" "-"
 
 27.127.175.202, 192.168.10.101 - - [19/Jan/2018:08:59:53 +0900] "POST /fileUpload/image HTTP/1.1" 200 - "-" "-"