This free Singapore phone number checker shows whether a number is valid.
A Singapore phone number checker tells you whether a number is real, which means it follows Singapore's numbering rules and is assigned. Enter a +65 number above and 1Lookup's free checker returns valid or invalid in seconds, with the line type and country, checked against Singapore's numbering plan.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
- Country code
- +65
- Mobile numbers
- 8 digits after +65, starting 8 or 9
- Written at home
- 8123 4567
- Written for apps and SMS
- +6581234567
- Dialed from the US
- 011 65 8123 4567
A Singapore mobile number is +65 followed by 8 digits, and the first one is 8 or 9.
Written with the country code
- +65Country code
- 8Mobile start
- 123 45677 more digits
The +65 comes before the number and is dropped when you dial inside Singapore.
A Singapore phone number checker reads a number's format first and then checks it against Singapore's numbering plan.
This is the path one check takes. A number can be written correctly and still not be assigned to anyone, so the format check alone is not the answer.
- You enter the numberType it the way it is written at home, such as 8123 4567, or paste it with +65.
- Its format is checkedEach type of number has its own rules. A mobile needs 8 digits after +65 and starts with 8 or 9 at home.
- It is checked against the numbering planNumbers outside the US and Canada are checked against the numbering plan of their country, which for this page is Singapore's.Nothing is sent to the number, so it never rings and its owner is never told.
- You see valid or invalidWith the line type and country in a few seconds, and the carrier or network where one is listed.
A Singapore mobile number has 8 digits after +65 and starts with 8 or 9, so any other length is not a valid mobile.
These lengths come from the numbering data for Singapore. Landlines have 8 digits too, so the length does not give the type and the first digit does: 8 or 9 for a mobile, 6 for a landline and 3 for an internet telephony number. Singapore has one numbering area, so there is no area code and no leading 0.
| Number type | Starts with at home | Digits after +65 | Written at home |
|---|---|---|---|
| Mobile | 8 or 9 | 8 | 8123 4567 |
A Singapore number has 8 digits, and its first digit shows the service, which is 6 for a landline, 8 or 9 for a mobile and 3 for internet telephony.
IMDA, the telecom regulator, sets the national numbering plan, and the first digit of a number says what it is for. The plan has a theoretical capacity of 100 million numbers, and it has no trunk code because Singapore is one numbering area.
| First digit | What the plan assigns it to | Length |
|---|---|---|
| 3 | Internet telephony numbers | 8 digits |
| 6 | Landline and internet telephony numbers | 8 digits |
| 8 | Radio network (mobile) numbers | 8 digits |
| 9 | Radio network (mobile) numbers and emergency codes | 8 digits, or 3 for an emergency code |
| 0 | International, trunk and border town call prefixes | 3 digits |
| 1 | Special service access codes and international prefixes | 4 or 5 digits |
Source: IMDA, The National Numbering Scheme, chapter 2 of the National Numbering Plan (2016), Table 2.1.
Between 56,500 and 60,800 Singapore subscribers a month kept their mobile number when they changed operator in the second half of 2025.
IMDA counts the subscribers who retained their mobile number when they switched to a new mobile operator, and it counts 9.83 million mobile subscriptions in December 2025, which is 160.9% of the population. A number can move between operators, so its first digits do not show the network it is on today.
| Month | Mobile subscriptions | Subscribers who kept their number and changed operator | Subscriptions as a share of the population |
|---|---|---|---|
| July 2025 | 9,932,000 | 56,800 | 162.5% |
| August 2025 | 9,944,600 | 60,500 | 162.7% |
| September 2025 | 9,958,000 | 58,800 | 162.9% |
| October 2025 | 9,950,700 | 59,000 | 162.8% |
| November 2025 | 9,896,900 | 56,500 | 161.9% |
| December 2025 | 9,831,500 | 60,800 | 160.9% |
Source: IMDA, Statistics on Telecom Services for 2025 (Jul - Dec), mobile market.
Phone calls were the third most common way scammers reached victims in Singapore in 2025, in 5,477 scam cases, and that count fell 18.7%.
The Singapore Police Force recorded 37,308 scam cases in 2025, down 27.6% from 51,501 in 2024. Its annual brief breaks the cases down by the way the scammer made contact. A valid number can still be used in a scam, and a phone call is one of the ways.
| Contact method | Scam cases in 2025 |
|---|---|
| Social media | 10,448 |
| Messaging platforms | 9,355 |
| Phone calls | 5,477 |
| Online shopping platforms | 3,804 |
| Other websites | 2,035 |
| Emails | 934 |
| Dating apps and websites | 886 |
| SMS messages | 450 |
| Classified ads | 379 |
| Online streaming services | 375 |
Source: Singapore Police Force, Annual Scam and Cybercrime Brief 2025, top contact methods.
Three common mistakes make a Singapore number fail the check, and each one is quick to fix.
Repeating +65 adds digits.
Write +65 8123 4567 once, with the country code at the front.
Typing too few or too many digits makes a number invalid.
A mobile number has 8 digits after +65. With 7 or 9 it cannot be a valid mobile, so look for a missing or doubled digit.
Leaving the wrong country selected changes how the number is read.
The checker reads a number by the rules of the country selected above, so keep Singapore selected for a +65 number. Paste a number with its + and country code and the country is read from the number itself.
These are the questions people ask most about checking Singapore phone numbers.
How do I check if a Singapore phone number is valid?
Enter the number in the box above with Singapore selected. The free checker returns valid or invalid in seconds, with the line type and country. Type it the way it is written at home, such as 8123 4567, or in full as +65 8123 4567.
How many digits is a Singapore phone number?
A mobile number has 8 digits after +65.
What does a Singapore mobile number start with?
Mobile numbers start with 8 or 9 at home, which is 8 or 9 after +65.
How do I write a Singapore number for an app or an SMS tool?
Use the E.164 form: a plus sign, 65, then the number and no spaces, such as +6581234567.
Does the Singapore phone number checker show the carrier?
It shows the carrier or network where one is listed. Numbers outside the US and Canada are checked against the numbering plan of their country rather than live carrier data, so some come back with no carrier name.
Does valid mean the Singapore number is active?
No. Valid means the number is real, correctly written for Singapore and assigned. Whether a line is switched on and reachable right now is a different question, and the free HLR lookup answers it.
Can I check a whole list of Singapore phone numbers?
Yes. This free tool checks one number at a time. A 7-day free trial opens CSV upload and the API, at 1 credit a number.
Does the person know I checked their number?
No. The check reads records only. No call or text goes to the number, so its owner is never told.
Does Singapore have area codes or a leading 0?
No. Singapore is one numbering area, so a number is 8 digits with no area code and no trunk prefix. IMDA's numbering plan leaves out the trunk code for that reason, so you dial the 8 digits as they are, and from abroad you add +65.
What does a Singapore landline number start with?
A landline starts with 6 and has 8 digits. Numbers that start with 3 are for internet telephony, and numbers that start with 8 or 9 are mobile, so the first digit gives the type.
Can I tell which network a Singapore mobile number is on from its digits?
No. Subscribers can keep their number when they change operator, and IMDA counted between 56,500 and 60,800 who did so each month in the second half of 2025. The free HLR lookup shows the network a mobile number is on now.
How many mobile subscriptions does Singapore have?
IMDA counted 9,831,500 mobile subscriptions in December 2025, which is 160.9% of the population, so there are more subscriptions than people.
How common are scam calls in Singapore?
The Singapore Police Force recorded 5,477 scam cases in 2025 where the scammer made contact by phone call, 18.7% fewer than the year before. Social media and messaging platforms were the contact method in more cases, with 10,448 and 9,355.
You can check numbers from other countries on their own pages.
These free tools answer the next question about a number.
- The +65 country code pageHow to dial Singapore, the time there now and the landline places.
- HLR lookupCheck whether a mobile number is switched on and reachable right now.
- Line type lookupSee whether a number is a mobile, a landline or VoIP.
- Carrier lookupFind the carrier or network behind a number.
- Phone validator for any countryThe same check with the country picker open to every country.
- Phone validation APIRun the same check from your own software, one request per number.
Sources: Google's libphonenumber numbering data for lengths, mobile starts and landline starts, as of September 24, 2026; the ITU list of country codes.