An ex-directory number.    From Wordnet, Princeton University. 

Susan (not her real name) is not just ex-directory.    From Wordnik.com.  [Be Nice, Happy, Quiet, Meek] Reference

If you ring Tim you're ringing an ex-directory number too.    From Wordnik.com.  [Not stalkerish behaviour at all] Reference

As for your comment about 'ex-directory' and the other one.    From Wordnik.com.  [Not stalkerish behaviour at all] Reference

"I have discovered you can't be ex-directory on the internet.".    From Wordnik.com.  [Cyberstalking: tackling the 'faceless cowards'] Reference

He's also ex-directory, so how did she get hold of his number?.    From Wordnik.com.  [Fox Evil]

It didn't look like the reclusive lair of an ex-directory hermit.    From Wordnik.com.  [Come To Grief]

You're not even in the telephone book; your number's ex-directory.    From Wordnik.com.  [Ellery Queen Mystery Magazine]

He phoned directory enquiries and ascertained that the number was ex-directory.    From Wordnik.com.  [Ellery Queen Mystery Magazine]

Her telephone number was ex-directory, and he couldn't know where she lived-could he?.    From Wordnik.com.  [Rome's Revenge]

Victor Waltman Verity was either ex-directory or had posted his letter far from home.    From Wordnik.com.  [Shattered]

You seem a bit stalky yourself there, Phil, considering your past form with ex-directory numbers.    From Wordnik.com.  [Not stalkerish behaviour at all] Reference

If I was on the receiving end of them, I'd have changed my number and gone ex-directory immediately.    From Wordnik.com.  [Fox Evil]

'I think you're splendid,' I said truthfully, and asked, 'Why are you ex-directory, with a business to run?'.    From Wordnik.com.  [Come To Grief]

They reveal he was being asked to establish home addresses and to find telephone numbers, some ex-directory.    From Wordnik.com.  [The readers' editor on… the Observer and the private investigator] Reference

It just might be a bit of a pain locating their contact details as I'm reasonably sure they are ex-directory.    From Wordnik.com.  [Archive 2009-07-01] Reference

Moreover our number was ex-directory, precisely so that Elizabeth should not be bothered by this sort of thing.    From Wordnik.com.  [Forfeit]

If it's ex-directory, it should be obvious that I only want people to have it if I choose to share it with them.    From Wordnik.com.  [What lefty blogs didn't mention......] Reference

He had a new telephone installed, with an s ro ex-directory number, billed to Herb's home address in St John's Wood.    From Wordnik.com.  [Final Resting Place of The Pen] Reference

Calling people who are ex-directory at home and screaming at them of course isn't stalkerish or strange behaviour either.    From Wordnik.com.  [Not stalkerish behaviour at all] Reference

At the third call, just when he was beginning to think she might have an ex-directory number, Beth Hynd answered the phone.    From Wordnik.com.  [Death of a Charming Man]

Looking at these methods, it seems likely that many, but not all, ex-directory numbers could have been obtained by blagging.    From Wordnik.com.  [The readers' editor on… the Observer and the private investigator] Reference

That was on my first day in here, and to this day he has yet to explain how he got my home telephone number (I'm ex-directory).    From Wordnik.com.  [Best of Chatterbox: Move, Moyles and man nights] Reference

It was necessary for Herb to have a private telephone, installed with great discretion, and operating on an ex-directory number.    From Wordnik.com.  [Final Resting Place of The Pen] Reference

A temporary solution might be to change your phone number and go ex-directory ... but if Leo's behind it, he'll soon find out the new one.    From Wordnik.com.  [Fox Evil]

An impersonal voice told me that the number of Patricia Huxford was ex-directory and could only be accessed by the police, in an emergency.    From Wordnik.com.  [Come To Grief]

Amount of time YouTube take to remove my ex-directory home address from their servers.    From Wordnik.com.  [Bloggerheads] Reference

It is possible to become ex-directory by texting the letter 'E' to 118 800 from your mobile phone.    From Wordnik.com.  [Gates of Vienna] Reference

My fixed line has been ex-directory for over 20 years, and I didn't have a problem with cold calls.    From Wordnik.com.  [BBC News | Technology | World Edition] Reference

I still haven't figured out how they obtained my ex-directory phone number, which they bombarded with calls.    From Wordnik.com.  [The Independent - Frontpage RSS Feed] Reference

If that doesn't work, then change your landline number and go ex-directory and change your mobile number too.    From Wordnik.com.  [The Daily Record - Home] Reference

The number is ex-directory, and the couple have no idea how it came to feature in the song of a 18-year-old rapper from Atlanta.    From Wordnik.com.  [Music news, reviews, comment and features | guardian.co.uk] Reference

For example, obtaining an ex-directory telephone number cost £75, while a car number-plate check to match it to an address cost £150.    From Wordnik.com.  [Slugger O'Toole] Reference

"As I'm ex-directory I couldn't help wondering where they got my number from.    From Wordnik.com.  [Some by Fire]

'How about an ex-directory number?'.    From Wordnik.com.  [Shattered]

Search for “ex-directory”. reply.    From Wordnik.com.  [The Post Transaction Marketing Wall Of Shame: Hundreds Of Well Known Ecommerce Sites Rip Off Customers] Reference

All that ex-directory piffle.    From Wordnik.com.  [Forfeit]

My parents have had to go ex-directory.    From Wordnik.com.  [MyAntiwar.org] Reference

And you're ex-directory.    From Wordnik.com.  [Disordered Minds]