[asterisk-users] EVERY toll free number appears to be in e164.org??

Karl Fife karlfife at gmail.com
Fri Jul 24 18:02:27 CDT 2009


ENUM lookups at e164.org return a IP route for ALL toll-free numbers.

I was surprised to observe that ALL toll-free numbers get a hit at e164.org. 
It appears that ALL toll-free prefixes have been delegated, thereby 
publishing an IP route for YOUR TOLL-FREE NUMBERS, my toll-free numbers, and 
even toll-free numbers that have not been allocated. :-)   See below

Should I care?  Even though this whole thing doesn't directly cost me 
anything, it seems like bad netizenship to be publishing circuitous routes 
to others' numbers.  Their route may be inferior; less direct (higher 
latency), and may also introduce more transport over best-effort networks 
(artifacts and jitter).

Is this a reasonable thing for e164.org to do?  Based on what I see at 
e164.org, one might make the reasonable assumption that ALL routes are 
published after a token test that the routes are sanctioned by the 'owners'. 
Perhaps their test is not perfect test, but you are free to do what you want 
with that information.  There is however no indication (that I can find) 
that ENUM lookups for toll-free numbers are actually what I might call 
'bandit routes', leading ITSP's and PBX admins to make routing decisions 
they might not otherwise make.  Perhaps CHASE BANK or MAYO CLINIC should be 
concerned when end-user callers (via their office PBX, or ITSP) unknowingly 
send their media (& secrets) through a stranger's gateway.   Maybe Coca-Cola 
should be worried that a poor quality call could be attributed to them, & 
their brand.

Am I correct in assuming that this basically a toll-free revenue share model 
to fund e164.org??   If so, it seems to me should be disclosed at e164.org, 
perhaps right next to where they ask for donations.  Can anybody speak to 
this?

-Karl

p.s.

for example try:
ast-chi43*CLI> !dig 0.0.0.0.0.0.0.6.6.8.1.e164.org ANY

Naturally this number on the PSTN returns a reorder tone.  The e164.org 
route actually rings instead of giving a reorder, answers and plays 'dead 
air' forever if you let it.

All resolve to one of the same three gateways:
tf.voipmich.com
sip.tollfreegateway.com
tollfree.sip-happens.com


;; QUESTION SECTION:
;3.5.3.6.4.1.3.7.7.8.1.e164.org.        IN      ANY

;; ANSWER SECTION:
3.5.3.6.4.1.3.7.7.8.1.e164.org. 60 IN   NAPTR   200 10 "u" "E2U+SIP" 
"!^\\+1877(.*)$!sip:1877\\1 at tf.voipmich.com!" .
3.5.3.6.4.1.3.7.7.8.1.e164.org. 60 IN   NAPTR   200 10 "u" "E2U+SIP" 
"!^\\+1877(.*)$!sip:1641641877\\1 at sip.tollfreegateway.com!" .
3.5.3.6.4.1.3.7.7.8.1.e164.org. 60 IN   NAPTR   200 10 "u" "E2U+SIP" 
"!^\\+1877(.*)$!sip:1641641877\\1 at tollfree.sip-happens.com!" .








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