help with grep

From: jammer <bjlockie@xxxxxxxxx>
Date: Mon, 11 Jun 2012 13:58:12 -0700 (PDT)

I'm trying to match 'ABCD 252'.

There is a variable number of spaces before the 2.
The 252 could be any number.

I tried:
grep 'ABCD[:blank:]+[:digit:]+' file
.

Follow-Ups:
- Re: help with grep
  - From: Robert Bonomi
- Re: help with grep
  - From: Ben Bacarisse
- Re: help with grep
  - From: Stephane Chazelas
- Re: help with grep
  - From: Chris F.A. Johnson

Prev by Date: Re: insert text to beginning of each word
Next by Date: Re: help with grep
Previous by thread: Re: insert text to beginning of each word
Next by thread: Re: help with grep
Index(es):
- Date
- Thread