The Ultimate CenturyLink 00xx Scan for Colorado
by Lucky225
It's been a while since I've seen an old-school phone phreak hand scan.
I decided back in February 2025 that it was time to start scanning every CenturyLink (now technically Lumen) exchange in Colorado (or at least the ones that had a 00xx block). I used a SIP trunk with direct tandem access (hence the tongue-in-check 'SIP & SCAN') and an AT&T wireless device to hand scan these numbers manually.
The project was completed on March 26, 2025.
Below is a small fraction of my findings focusing on two exchanges.
I encourage others to scan their own local areas and see what's still out there. The RBOCs usually hide their cool numbers in NXX-00XX or NXX-99XX, but not always.
Location: Arvada, Colorado CLLI: ARVDCOMADS0 Switch Type: Northern Telecom DMS-100 303-403-00XX 10 Milliwatt 11 Reorder 12 Milliwatt 14 Weird tones 15 Weird tones 16 Busy tone 17 Silence 20 This local call has changed to ten-digits. It is not necessary to dial a one when calling this number. Please redial using area code 303. 22 Dial tone 23 Rings (CNAM: CenturyLink) 50 Your call can not be completed as dialed. If you have dialed a five-digit access code it has changed, please redial adding a one and zero before the 5-digit code or contact the carrier for help. 51 It is not necessary to dial a carrier access code for the number you have dialed. 52 It is not necessary to dial a one or zero when calling this number. 53 It is not necessary to dial a one or zero when calling this number. 54 You must first dial a one when calling this number. 56 Your call can not be completed as dialed. 57 We're sorry, in order to complete this call you must first dial a one-zero and the three digit carrier access code. 58 Check your instruction manual or call the repair service for assistance. 59 All circuits are busy now. 60 Due to network difficulties, your long distance call can not be completed at this time. 61 This call requires a coin deposit. 62 All circuits are busy now. 63 Due to telephone company facility trouble, your call can not be completed at this time. 64 All circuits are busy now. 65 Your call did not go through. 66 If you'd like to make a call, please hang up and try again. If you need help, hang up and then dial your operator. 67 Your call can not be completed as dialed. Please check the number and try again or call your attendant to help you. 68 It is not necessary to dial the digits 950 before the long distance company access code. 69 We can not process your custom calling request at this time. 70 Your long distance call can not be completed because your service has been restricted. Please contact your CenturyLink business office. 71 You have dialed a number which can not be reached from your calling area. 72 The last call to your telephone can not be traced and no charge will be added to your bill. 73 Your call has been completed. However, the party you are calling is not receiving calls at this time. 74 The last call to your telephone has been traced and a one dollar charge will be added to your bill. 75 The party you are calling does not accept blocked calls. 76 The party you have called is on the phone. Please hold and they will be with you shortly. 77 The party you have called is on the phone. They will call you back in a few minutes. 79 Due to heavy calling, we can not complete your call at this time. 80 To activate telephone service at this location, please contact your local service provider of choice. 81 The number called is busy. A special ringing will tell you when the line is free, please hang up now. 82 The number can not be reached now. Please hang up and try again later. 83 The number called can not be reached. Please hang up now. 84 The number was free, but it has just become busy again. A special ringing will tell you when the line is free. 85 You have canceled your request. Please hang up now. 86 Your call did not go through. 87 This is your last call return service. The number of your last incoming call is a private number and can not be announced. To activate last call return, dial one, otherwise hang up. Please dial one now, or hang up. 88 The number you are calling was blocked and can not be called back using your last call return service.
Location: Aberdeen, Colorado CLLI: ENWDCOABDS0 Switch Type: Western Electric 5ESS 303-790-00XX 01 Due to telephone company facility trouble, your call can not be completed at this time. 02 Rings (CNAM: CenturyLink) 05 Weird tone 06 Weird tone 07 To activate telephone service at this location, please contact your local service provider of choice. Thank you. 08 Rings (CNAM: CenturyLink) 09 Milliwatt 10 Line echo test 11 Weird tone 13 Your call can not be completed as dialed. Please check the number and dial again. 17 Rings (CNAM: CenturyLink) 20 Static/broken recording 21 Rings (CNAM: CenturyLink) 25 It is not necessary to dial a one or zero when calling this number. 27 You must first dial a one when calling this number. 28 Milliwatt 34 Rings (CNAM: ENGLEWOOD,CO) 40 A long distance company access code is required for the number you dialed. Please dial your call with the access code. 50 Milliwatt 51 Rings (CNAM: CenturyLink) 52 It is not necessary to dial the digits 950 before dialing your carrier access code (male) 53 It is not necessary to dial a long distance company access code for the number you dialed. 54 Your call can not be completed as dialed. If you dialed a five-digit access code it has changed. Please redial adding a one and zero before the five-digit code. 55 All circuits are busy now. 56 Milliwatt 59 All circuit are busy now. 60 If you'd like to make a call, please hang up and try again. If you need help, hang up and then dial your operator. 61 Coin deposit recording. 63 Due to telephone company facility trouble, your call can not be completed at this time. 64 Your call did not go through. 65 All circuits are busy now. 66 Due to network difficulties, your long distance call can not be completed at this time. 68 Milliwatt 69 The number called is busy. A special ringing will tell you when the line is free. Please hang up now. 70 The number called can not be reached. Please hang up now. 71 Your long distance call can not be completed because your service has been restricted. Please contact your CenturyLink business office. 72 You have dialed a number which can not be reached from your calling area. 73 Silence/reorder 74 We're sorry. Your call can not be completed as dialed. Please check the number and try again or call your attendant to help you. 75 Thank you for calling, we are sorry to delay your call. Please stay on the line and a representative will assist you in just a moment. 76 Thank you for calling. The number you called is currently busy. Please remain on the line and your call will be answered in the order received. 77 You have canceled your request. Please hang up now. 78 The last call to your telephone can not be traced and no charge will be added to your bill. 80 The number was free, but it has just become busy again. You may reactivate if you wish by redialing the original code. 81 Your call has been completed. However, the party you are calling is not receiving calls at this time. 82 The last call to your telephone has been traced and a one dollar charge will be added to your bill. 83 This local call has changed to ten-digits. It is not necessary to dial a one when calling this number. Please redial using area code 303. 90 Reorder 94 The number can not be reached now. Please hang up and try again later. 95 The party you are calling does not accept blocked calls. 96 Rings (CNAM: ENGLEWOOD,CO) 97 The party you have called is on the phone. Please hold and they will be with you shortly. 99 Congratulations! You've reached the Aberdeen 5ESS office. Thank you.