regex101: PCRE (Legacy) Match Workspace

Regular Expression

<AccountNumber>(\d{12})

New

<ns2:PaymentMethod>
  <CCInfo xmlns="">
           <AccountType>sdaj</AccountType>
           <AccountNumber>1234567890123456</AccountNumber>
           <AccountName>sdfsad</AccountName>
           <ExpirationMonth>sdaf</ExpirationMonth>
           <ExpirationYear>afgds</ExpirationYear>
    </CCInfo>
  </ns2:PaymentMethod>
  <ns2:PaymentMethod>
  <CCInfo xmlns="">
           <AccountType>kyfkuk</AccountType>
           <AccountNumber>098765432123987</AccountNumber>
           <AccountName>hjvkv</AccountName>
           <ExpirationMonth>gfdgh</ExpirationMonth>
           <ExpirationYear>tdjk</ExpirationYear>
    </CCInfo>
  </ns2:PaymentMethod>