JSFiddle - React, Tailwind, and code Playground

HTML

<div id="cta">
    <div class="callus">Call us today!</div>             
    <div class="phonenumber">404-555-5555</div>
</div>

CSS

#cta {
	font-family: Arial, sans-serif;
	font-weight: bold;
	font-size: 20px;
	padding: 10px 20px;
	color: #FFF;
	text-align: center;
	text-transform: uppercase;
	background: #232323;
    max-width: 400px;
    margin: auto;
}
.callus, .phonenumber {
    display: inline-block;
}