Tap-to-call phone links: Crawl Audit check 110

Short answer: on a phone, a number wrapped in a tel: link starts a call with one tap. A plain number has to be copied and pasted. Check 110 warns when your page shows what looks like a phone number but has no tel: link.

What Crawl Audit checks

• Pass: a link starting with tel:.
• Warning: no tel: link, but a phone-like number (nine or more digits, spaces or brackets) in the page text.
• Pass: no phone number at all.

The number pattern is loose. Long reference numbers or dates can look like phone numbers to it.

What MDN says

• Links can point to "Telephone numbers with tel: URLs".
• "tel: link behavior varies with device capabilities": "Cellular devices autodial the number", while laptops may offer a calling app.

<a href="tel:+923060720072">+92 306 072 0072</a>

Getting it right

• Put the full international number in the link: a plus sign, the country code, then the number without the leading zero or spaces.
• Show the number in the visible text too. Some people want to read it or save it.
• For a WhatsApp number, a https://wa.me/ link works the same way.

On devmarde.com

Our number, +92 306 072 0072, is a tap-to-call link, so this passes.

Sources

• MDN, <a>: The Anchor element, checked 6 October 2026.
• IETF, RFC 3966: The tel URI for telephone numbers.