Area Code 202

Area code 202 is one of the original 86 North American Numbering Plan area codes established by AT&T in October 1947, assigned exclusively to serve the District of Columbia. It was the second numbering plan area created nationally — after New Jersey's area code 201 — making DC the first non-state jurisdiction in the NANP to receive its own area code. Source: NANPA Petition to DC PSC (FC 1165)

The code 202 was deliberately structured following AT&T's original rotary-dial conventions. The middle digit "0" indicated a single-code jurisdiction — an entire state or district served by just one area code. DC received fast-dialing "2" digits in the first and third positions, reflecting its significant population, but the "0" middle digit meant the code required 14 pulses on a rotary telephone (2+0+2), compared to just 5 pulses for New York's 212. This made 202 slower to dial than codes assigned to multi-NPA states, though it was still below the national average of 14.1 pulses for codes created in the same era. Source: The Directory — Area Code 202 History

• October 1947: Area code 202 is created as one of the 86 original NANP codes. DC becomes the second numbering plan area established, receiving its own area code before much larger states like California (213) and Texas (214). The entire District of Columbia — all 68.34 square miles — falls under a single rate center: Washington Zone 1 (WSHNGTNZN1). Source: NANPA Petition to DC PSC (FC 1165)
• 1947–1990: Central Office Code Protection Era: The Washington Metropolitan Exchange Area (WMEA) operated a unique central office code protection system across three area codes — 202 (DC), 301 (Maryland), and 703 (Virginia). Under this system, no two NPAs in the WMEA could share the same three-digit prefix. If 202-574 existed in DC, then 703-574 and 301-574 could only be assigned to central offices far from the metropolitan area. This unprecedented arrangement allowed residents across DC, suburban Maryland, and northern Virginia to make local calls using only seven digits across three area codes for 43 years — a capability unmatched elsewhere in the NANP. Source: NANPA Petition to DC PSC (FC 1165)
• April 1, 1990: Permissive 10-digit dialing begins for cross-NPA calls within the WMEA, as documented in NANPA Industry Letter IL-90/04-003. Callers could begin using 10-digit dialing for calls between 202, 301, and 703, though 7-digit dialing remained functional during the transition period. Source: DC PSC FC 1165 Public Notice
• October 1990: Mandatory 10-digit dialing is enforced for all cross-NPA calls within the WMEA, as documented in NANPA Industry Letter IL-90/12-049. Seven-digit dialing is retained only for intra-NPA calls within 202 itself. The end of the central office code protection system marked a watershed moment for the Washington Metropolitan calling area. Source: DC PSC FC 1165 Public Notice
• June 16, 2020: The North American Numbering Plan Administrator (NANPA) files a petition with the DC Public Service Commission under docket FC 1165, requesting all-services overlay relief for the 202 NPA. The petition presents a detailed exhaust analysis: 753 of 800 possible central office (NXX) codes were assigned, with only 29 available and 18 unavailable. Annualized demand stood at 15.37 codes per year, projecting exhaustion by Q3 2022. Because the entire 202 NPA consists of a single rate center (Washington Zone 1), a geographic split was impossible — an overlay was the only viable relief method.

  Regulatory History

  The regulatory history of area code 202 is governed by the District of Columbia Public Service Commission (DC PSC), which exercises delegated authority under the federal framework established by the FCC. Under 47 C.F.R. §52.19, the FCC grants states and jurisdictions the authority to implement numbering conservation measures, with NANPA administering the numbering plan nationally. For DC, the DC PSC serves as the primary regulator for area code relief actions. Source: NANPA Petition to DC PSC (FC 1165)

  Year	Event	Docket	Regulatory Action & Impact
  1947	NANP established	AT&T Nationwide Numbering Plan	AT&T establishes the North American Numbering Plan, assigning 202 to the District of Columbia as the second NPA created. DC PSC gains delegated authority over numbering relief for the jurisdiction under federal telecommunications law. Source: The Directory — Area Code 202 History
  1990	End of central office protection	NANPA IL-90/04-003, IL-90/12-049	Mandatory 10-digit dialing enforced for cross-NPA calls within the WMEA. Permissive dialing began April 1, 1990; mandatory dialing took effect October 1990. The central office code protection system across 202/301/703 is formally retired. Source: DC PSC FC 1165 Public Notice
  2020-06-16	Relief petition filed	FC 1165 — NANPA Petition	NANPA files petition with DC PSC requesting all-services overlay relief for 202. Exhaust data: 753 NXX codes assigned, 29 available, 18 unavailable. Annualized demand: 15.37 codes/year. Single rate center (Washington Zone 1) makes geographic split impossible. Source: NANPA Petition to DC PSC (FC 1165)
  2020-06-23	Public proceeding opened	FC 1165 — Public Notice	DC PSC issues public notice opening a formal proceeding on the NANPA petition. Projected exhaust: Q3 2022. Virtual community hearing scheduled for August 17, 2020. Source: DC PSC FC 1165 Public Notice

  2020-09-16Overlay approvedCommission Order No. 20627 (FC 1165)DC PSC approves all-services distributed overlay for 202, adding area code 771. The Commission determined overlay was the only viable relief method due to single-rate-center constraints. This is the authoritative regulatory approval for the 202/771 overlay.

  County Coverage

  Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 202).

  County	Population	Share
  District of Columbia, DC	672,079	100.0%