Add a free carrier lookup box to your website with one paste of HTML.
Copy the snippet below into any page that accepts custom HTML. Your visitors type a phone number into the box, and a free carrier lookup opens in a new tab with that number already filled in.
- Plain HTML with inline styles, so there is no script, no iframe and no cookie
- The box is at most 420 pixels wide and shrinks to fit a phone screen
- Free to add, with no account and no key
This is the box, and this is the code that puts it on your page.
Live preview
Free carrier lookup by 1Lookup
<div style="box-sizing:border-box;width:100%;max-width:420px;margin:0;padding:0;font-family:inherit;">
<form method="get" action="https://www.1lookup.io/tools/carrier-lookup" target="_blank" style="display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;">
<input type="text" name="q" placeholder="(555) 555-0132" aria-label="Phone number" inputmode="tel" autocomplete="off" required style="box-sizing:border-box;flex:1 1 200px;min-width:0;margin:0;padding:11px 14px;font-family:inherit;font-size:16px;line-height:1.4;color:#111827;background:#ffffff;border:1px solid #d1d5db;border-radius:10px;-webkit-appearance:none;appearance:none;">
<input type="hidden" name="utm_source" value="embed">
<input type="hidden" name="utm_medium" value="widget">
<input type="hidden" name="utm_campaign" value="carrier-lookup-embed">
<button type="submit" style="box-sizing:border-box;flex:1 1 auto;margin:0;padding:11px 18px;font-family:inherit;font-size:16px;font-weight:600;line-height:1.4;color:#ffffff;background:#2563eb;border:1px solid #2563eb;border-radius:10px;cursor:pointer;-webkit-appearance:none;appearance:none;">Look up carrier</button>
</form>
<p style="margin:8px 0 0;padding:0;font-size:14px;line-height:1.4;color:#4b5563;">Free carrier lookup by <a href="https://www.1lookup.io/tools/carrier-lookup" style="color:#2563eb;text-decoration:underline;">1Lookup</a></p>
</div>The box sends your visitors to a free carrier lookup that shows the carrier and the line type.
They type a number
A visitor types any phone number into your box and presses Look up carrier.
The free lookup opens
It opens in a new tab and your page stays open behind it. The number is already in the box, and nothing is looked up until the visitor presses the button there.
They read the result
The result names the carrier the number is on today and says whether the line is mobile, landline or VoIP. A US or Canada number also shows whether it was ported.
The snippet is plain HTML, so it works on any site and adds almost nothing to your page.
- It has no script, no iframe, no external file and no tracking pixel: the whole box is one form and one line of text.
- It adds about 1.4 KB of HTML and makes no request until a visitor presses the button.
- Every press adds three tags to the link (utm_source=embed, utm_medium=widget and utm_campaign=carrier-lookup-embed), so 1Lookup can count the visits that come from boxes like yours.
- The line under the box is a plain, visible link to 1Lookup, in readable text.
The box fits pages where readers already hold a phone number and a question about it.
Phone and telecom blogs
A post about spam calls, number porting or area codes can end with a way to check the number the reader just received.
Business phone and text messaging sites
A help page can let visitors see whether a number is mobile, landline or VoIP before they send it a text.
Small business sites
A contact page can offer a free way to see which carrier a number that keeps calling is on.
These are the questions site owners ask before adding the box.
How do I add the carrier lookup box to a WordPress site?
In the block editor, add a Custom HTML block where the box should go, paste the snippet into it and update the page. In the classic editor, switch to the Text tab and paste the snippet there. The box shows on the page once it is saved, and in the preview.
How do I add the carrier lookup box to a Webflow site?
Open the Add panel in the Designer, drag an Embed element onto the page, paste the snippet into it and choose Save and Close. Publish the site, or use Preview, to see the box working.
How do I add the carrier lookup box to a Squarespace site?
Edit the page, add a Code block where the box should go and paste the snippet into it. Turn Display Source off so the block shows the box and not the code, then save the page.
Is the carrier lookup box free?
Yes. The snippet is free to use, with no account and no key, and any number of sites can carry it. The lookup it opens is free for visitors to try without signing up. That lookup limits how many checks one visitor can run, so it suits one number at a time, not whole lists.
Will the box slow my website down?
No. The snippet is about 1.4 KB of HTML with its styles written inline, and there is no script, iframe, font or image to load. The browser draws it with the rest of your page, and it makes no request until a visitor presses the button.
Can I change the colors and the size of the box?
Yes. Every style is written inline in the snippet, so you can edit it where it sits: replace #2563eb with your own color on the button and the credit link, change the border radius, or lower max-width:420px to make the box narrower. On a dark background, also change the text colors of the input and the credit line so both stay easy to read. Please leave the credit line under the box in place.
What does a visitor see after they use the box?
They type a number and press Look up carrier. The free carrier lookup opens in a new tab with the number already in its box, and your page stays open. They press the button there to see the carrier and the line type. Your page sends nothing on its own: no script runs and no cookie is set, and the number travels only when the visitor presses the button, in the address of the page that opens.
Does the box work for phone numbers outside the United States?
Yes. A visitor can type a number from another country with a plus sign and the country code, such as +44 20 7946 0958, and the lookup picks the country from it. A number typed without a plus sign is read as a US number until the visitor picks another country in the lookup.