The following table summarizes revenue by region based on the billing address of customers:

	Three Months Ended April 30,
	2019					2018
	Amount		Percentage of Revenue			Amount		Percentage of Revenue
	(in thousands, except percentages)
Americas	$	98,160		80	%	$	49,559		82	%
APAC		10,441		9			4,742		8
EMEA		13,387		11			5,769		10
Total	$	121,988		100	%	$	60,070		100	%

We receive payments from customers based on a billing schedule as established in our customer contracts. Accounts receivable are recorded when we contractually have the right to consideration. In some arrangements, a right to consideration for our performance under the customer contract may occur before invoicing to the customer, resulting in an unbilled accounts receivable. The amount of unbilled accounts receivable included within accounts receivable, net on the condensed consolidated balance sheets was $6.9 million and $7.2 million as of April 30, 2019 and January 31, 2019, respectively.

Contract liabilities consist of deferred revenue. Revenue is deferred when we have the right to invoice in advance of performance under a customer contract. The current portion of deferred revenue balances are recognized over the next 12 months. The amount of revenue recognized during the three months ended April 30, 2019 and 2018 that was included in deferred revenue at the beginning of each period was $53.6 million and $23.3 million, respectively.

The terms of our subscription agreements are monthly, annual, and multi-year, and we may bill for the full term in advance or on an annual or monthly basis, depending on the customer preference. As of April 30, 2019, the aggregate amount of the transaction price allocated to remaining performance obligations was $376.5 million, which consists of both billed consideration in the amount of $149.3 million and unbilled consideration in the amount of $227.2 million that we expect to recognize as revenue. We expect to recognize 64% of our remaining performance obligations as revenue over the next 12 months, and the remainder thereafter.