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j3rky posted a topic in Old Skool PhreakingOn The Bridge St. DS0 (NYCKNYBRDS0) which is a WECO 5ESS (Digital) according to telcodata, 660-(My 7 digit landline #) will give me an alternating (on/off) wierd tone (I will make recordings ASAP), but I have not been able to get it to ringback, 660 + any other number or 660 + the last 4 digits of my landline # will only get an error message. I have tried instantaneously hanging up but 660 does not yield a callback (maybe Im doing it wrong?). On a separate train of thought I was interested in checking out if there were any interesting unknown vertical service codes (i.e, *67. *69, *72, etc.) I finally arrived upon NANPA's list of vertical service codes (http://www.nanpa.com/number_resource_info/vsc_assignments.html) and have three "ringback" codes at least on my switch, 2 of which actually callback, none pass any caller ID info. *53, *54, and *55 are listed as Single Line Variety Package (SVP) - Distinctive Rings (B, C, and D respectively). *53, and *54 do ring back on my switch, but it is not a normal ring, it is distinctive (will put up recordings ASAP). Is there any more information on these service codes? It's kind of cool because it's the first "ringback" method that actually worked for me, I havent had any other telco code ringback for me successfully before, and I havent been able to find out too much. Sorry if this has been posted, I would appreciate any info on the Single Line Variety stuff if anyone knows. Also if anyone has more info on 660 and how to possibly get it to ring back that would be awesome. Thanks