Goto Section: 52.5 | 52.9 | Table of Contents
Revised as of October 1, 2010
Goto Year:2009 |
§ 52.7 Definitions.
As used in this subpart:
(a) Area code or numbering plan area (NPA). The term "area code or
numbering plan area" refers to the first three digits (NXX) of a
ten-digit telephone number in the form NXX-NXX-XXXX, where N represents
any one of the numbers 2 through 9 and X represents any one of the
numbers 0 through 9.
(b) Area code relief . The term "area code relief" refers to the
process by which central office codes are made available when there are
few or no unassigned central office codes remaining in an existing area
code and a new area code is introduced. Area code relief includes
planning for area code "jeopardy," which is a situation where central
office codes may become exhausted before an area code relief plan can
(c) Central office (CO) code. The term "central office code" refers to
the second three digits (NXX) of a ten-digit telephone number in the
form NXX-NXX-XXXX, where N represents any one of the numbers 2 through
9 and X represents any one of the numbers 0 through 9.
(d) Central office (CO) code administrator. The term "central office
code administrator" refers to the entity or entities responsible for
managing central office codes in each area code.
(e) North American Numbering Plan Administrator (NANPA). The term
"North American Numbering Plan Administrator" refers to the entity or
entities responsible for managing the NANP.
(f) Billing and Collection Agent . The term "Billing & Collection
Agent" ("B&C Agent") refers to the entity responsible for the
collection of funds to support numbering administration for
telecommunications services from the United States telecommunications
industry and NANP member countries.
(g) Pooling Administrator (PA). The term "Pooling Administrator" refers
to the entity or entities responsible for administering a
thousands-block number pool.
(h) Contamination. Contamination occurs when at least one telephone
number within a block of telephone numbers is not available for
assignment to end users or customers. For purposes of this provision, a
telephone number is "not available for assignment" if it is classified
as administrative, aging, assigned, intermediate, or reserved as
defined in § 52.15(f)(1).
(i) Donation. The term "donation" refers to the process by which
carriers are required to contribute telephone numbers to a
thousands-block number pool.
(j) Inventory. The term "inventory" refers to all telephone numbers
distributed, assigned or allocated:
(1) To a service provider; or
(2) To a pooling administrator for the purpose of establishing or
maintaining a thousands-block number pool.
[ 61 FR 47353 , Sept. 6, 1996, as amended at 62 FR 55180 , Oct. 23, 1997;
65 FR 37707 , June 16, 2000]
Goto Section: 52.5 | 52.9
Goto Year: 2009 |
CiteFind - See documents on FCC website that
cite this rule
Want to support this service?
Report errors in
this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please
help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
Helping make public information public