a Korean mobile number
Matches a Korean mobile number. It is anchored at both ends, so the whole string has to match. There are no capture groups.
Pattern
/^01[016789]-?\d{3,4}-?\d{4}$/- Match scope
- the whole string
- Capture groups
- 0
- What it catches in the first example
- 010-1234-5678
Try it yourself
Type any text and the parts this expression catches are highlighted. It runs in your browser and is never sent anywhere.
010-1234-5678
1 match
Examples that match
- 010-1234-5678
- 01012345678
Examples that do not match
- 02-123-4567
- 010-12-5678
Other expressions in this group
^0x[0-9a-f]+$a hex number written with the 0x prefix^[0-9a-f]{64}$a sixty-four character hash^[0-9a-f]{24}$a twenty-four character document id^\d{5}$a five-digit postal code^[A-Z]{2}$a two-letter country code^(\d{1,3}\.){3}\d{1,3}/\d{1,2}$an IPv4 address with a CIDR prefix^[가-힣]{2,5}$a Hangul name of two to five syllables^\d{5}(-\d{4})?$a US ZIP codeHow to read this
- With ^ and $ around it, the whole string must match; without them the match can sit anywhere. Always anchor an expression you use for validation.
- Round brackets ( ) capture what they wrap. When you only need grouping, write (?: ) so the numbering of later groups does not shift.
- Every expression here is checked against its examples. Even so, "looks like an email" and "is a real inbox" remain different questions.
- Nested open-ended repeats such as (a+)+ can blow up on certain inputs. Look for that shape before pasting someone else’s expression into your code.
Frequently asked questions
Q. What is the regex for a Korean mobile number?
^01[016789]-?\d{3,4}-?\d{4}$.
Q. Which strings match?
Text like 010-1234-5678 matches; text like 02-123-4567 does not.
Q. Does the whole string have to match?
Yes. It is wrapped in ^ and $, so nothing but a full match passes.
Q. How do I use what it caught?
There are no capture groups, so only the whole match (match[0]) comes back. Wrap the part you need in brackets to capture it.