07521608521
Mobile (United Kingdom)
07521608521 is a Mobile phone number assigned to the O2 service provider. This may be one of the rare calls, like an incorrectly dialed number, a call from someone you know or from a company about a service or product you ordered. Leave your report if you still notice anything strange.
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Alternative number formats
The phone number can be identified in different formats such as national, E164 - international standard, RFC3966 - URI standard for telephone numbers.
Searched in the last 24 hours
Most frequently searched (07521) phone numbers in the past 24 hours.
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Recent reports:
this number called claming to be from 3 mobile
Called me then hung up, no speech
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Caller hung up when answered, hence, AUTO CALL, seeing if someone would pickup, then your number is short listed for a follow up call, this time by a...
Beware, this is a scammer who tempts you to invest in the exchange wallet app with which you can buy Crypto Coins, there is no date to meet, no intere...
Called twice in two minutes. SPAM
I received a call from this number this morning, I was quite distracted at the time and when they asked if they were talking to [my name] I said yes,...
They said they were calling me to report fraud on my credit card
Text to me “Pay your Fast Trak lane tolls by February 21, 2025. To avoid a fine and keep your license, you can pay at:” Gave an e address to send pay...
fake binance
What is national telephone number format?
A national telephone number is a single telephone number that allows the routing of calls to different
locations within one country. In most cases, a national telephone number consists of 10 digits: a
three-digit area code, and a seven-digit subscriber number.
"0" before number is the
long distance dialling code within the UK.
What is E164 telephone number format?
When calling a country outside of the United Kingdom, you have to call that country's international
access code in order to place an international call.
"+44" is the country calling code assigned to the United Kingdom by the
International Telecommunication Union(ITU) E164 standard. Normally known as the international telephone number format.
What is RFC3966 telephone number format?
RFC3966 is a telephone number URI (Uniform Resource Identifier) standard for
describing resources identified by telephone numbers.
According to RFC3966 document, resources
identified by telephone numbers uses "tel" URI scheme.
E.g. tel:+44-xxx-xxx-xxxx.
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