FCC Record, Volume 15, No. 3, Pages 1205 to 1858, Supplement Page: 1,278
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Commission to ensure that carriers in dire need of numbering resources can obtain the
numbering resources necessary to continue to provide service to their prospective customers, if
the rationing plan will not ensure that the carrier will have adequate and timely access to
27. Thousands-block number pooling. The Ohio Commission requests authority to
implement mandatory thousands-block number pooling where and when the state determines it
to be appropriate.62 The Commission tentatively concluded that thousands-block pooling is an
important numbering resource optimization strategy, essential to extending the life of the
NANP.3 In granting the Illinois Commission the authority to engage in a mandatory thousandsblock
pooling trial in the Pennsylvania Numbering Order, the Commission recognized that state
number pooling trials could aid in developing national pooling implementation, architecture, and
28. In prior orders, the Commission has granted several state public utility
commissions the authority to implement thousands-block pooling trials.4 In so doing, the
Commission considered support for the proposal as well as concerns regarding the burdens that
thousands-block pooling trials might impose.65 The Commission noted that, in spite of the
potential for strain on the network occasioned by multiple pooling trials, the relatively small
volume of ported numbers and the importance of providing relief to states experiencing severe
strain on their numbering resources weighed heavily in favor of delegating authority to
implement number pooling trials. 66
29. Since the release of the Pennsylvania Numbering Order, the telecommunications
industry has arrived at detailed guidelines governing the technical and administrative functioning
of thousands-block number pooling. In the Pennsylvania Numbering Order, the Commission
stated that upon the establishment of uniform, national standards for pooling, it may determine
62 Petition at 6. Historically, network routing mechanisms are based upon the understanding that geographic
numbers are assigned on an NXX code basis and associated with a specific switch, and, correspondingly, that the
network address to which the call must be routed is embedded in the first six digits (NPA-NXX) of the called
number. Thousands-block umber pooling allows service providers in a given area to receive numbers in blocks
of 1,000 by breaking the association between the NPA-NXX and the service provider to whom the call is routed.
Through number pooling, participating carriers can effectively share numbering resources from NXX codes
rather than receiving an entire NXX code at a time. Numbering Resource Optimization Notice at 130.
63 Numbering Resource Optimization Notice at 1 138.
64 See, e.g., California Delegation Order at 11-22; Florida Delegation Order at I 10-21; Maine Delegation
Order at HI 26-36; Massachusetts Delegation Order at t[ 11-22; New York Delegation Order at N 10-21.
65 See, e.g., California Delegation Order at 1 12; Florida Delegation Order at I 11; Maine Delegation Order at
1 28; Massachusetts Delegation Order at 1 12; New York Delegation Order at [ 11.
66 See, e.g., Massachusetts Delegation Order at TI 13-14.
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United States. Federal Communications Commission. FCC Record, Volume 15, No. 3, Pages 1205 to 1858, Supplement, book, 2000; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc2992/m1/91/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.