<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'>I drew a picture, hoping it would clear things up a bit.<br><br>Through my switch, we're trying to call a number in a block assigned to Sycamore, with an LRN in a DeKalb number block, but the common tandem operator is telling me that the LRN actually lives on a different tandem.<br><br><div><span name="x"></span><br><br>-----<br>Mike Hammett<br>Intelligent Computing Solutions<br>http://www.ics-il.com<br><br><br><br>Midwest Internet Exchange<br>http://www.midwest-ix.com<br><br><span name="x"></span><br></div><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Mike Hammett" <voiceops@ics-il.net><br><b>To: </b>voiceops@voiceops.org<br><b>Sent: </b>Tuesday, August 28, 2018 4:46:52 PM<br><b>Subject: </b>[VoiceOps] LNP, tandems, etc.<br><br><style>p { margin: 0; }</style><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000">I thought you had to be on the same tandem to port a number, but with what our tandem operator (Frontier) is telling me, this isn't the case.<br><br>Comcast ported a number from us in town A. The LRN they pointed to is based in town B (per TelcoData). The tandem generally used by carriers in both towns is based in town B. Naturally, we send traffic to that tandem.<br><br>The operator of that tandem is telling us that the LRN is actually homed off of a different tandem in our LATA (operated by CenturyLink) in town C. Unfortunately, I can't corroborate this information with TelcoData the only rate center I see off of that tandem in TelcoData is an AT&T town next door.<br><br>Where can I read up authoritatively on the porting requirements that would apply to this and related bits of info I should know?<br><br>I'm checking on our LERG access as I know that has the authoritative information, but I don't have that access at the moment. Maybe we're not subscribed to it.<br><br>Number NPA-NXX in town A: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=991<div>LRN NPA-NXX in town B: https://www.telcodata.us/search-area-code-exchange-detail?npa=815&exchange=901</div><div>Tandem in town B: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DKLBILXA50T<br>Tandem in town C: https://www.telcodata.us/search-switches-by-tandem-clli?cllicode=DIXNILXA50T<br><br><br>Thanks.</div><div><br><div><span></span><br><br>-----<br>Mike Hammett<br>Intelligent Computing Solutions<br>http://www.ics-il.com<br><br><br><br>Midwest Internet Exchange<br>http://www.midwest-ix.com<br><br><span></span><br></div></div></div><br>_______________________________________________<br>VoiceOps mailing list<br>VoiceOps@voiceops.org<br>https://puck.nether.net/mailman/listinfo/voiceops<br></div><br></div></body></html>