“Corrected” = standardized after repair (spelling, abbreviation, formatting). Rows that could not be standardized are the ones most likely to fail in the mail stream. Verify or retire them first.
| Gap | Rows | Share |
|---|---|---|
| Missing ZIP entirely | 3 | 15% |
| 5-digit only (no +4) | 16 | 80% |
| Address (largest clusters) | Cluster size |
|---|---|
| 350 FIFTH AVENUE, NEW YORK, NY, 10118 | 1 row |
| 1600 PENN. AVENUE NW, WASHINGTON, DC, 20500 | 1 row |
| 233 SOUTH WACKER DRIVE, CHICAGO, IL, 60606 | 1 row |
3 rows sit in duplicate clusters; keeping one per cluster retires 0 rows.
| County | Rows | Share of geocoded |
|---|---|---|
| New York County, New York | 4 | 25% |
| Cook County, Illinois | 3 | 18.8% |
| District of Columbia, District of Columbia | 2 | 12.5% |
| Suffolk County, Massachusetts | 2 | 12.5% |
| Los Angeles County, California | 2 | 12.5% |
| San Francisco County, California | 1 | 6.3% |
| Travis County, Texas | 1 | 6.3% |
| San Juan Municipio, Puerto Rico | 1 | 6.3% |
Median household income across matched neighborhoods (Census ACS 5-year, tract level): p25 $70,667 · median $72,176 · p75 $155,483 — sampled over 16 enriched rows.
5 rows sit in census tracts with ≥10% housing vacancy (average tract vacancy across the list: 10.4%). High-vacancy tracts correlate with address churn — treat these rows as the second verification priority after the could-not-standardize set.
16 rows standardized to a deliverable address today. People move; the address stays in the file. At the national mover rate (7.8% of people lived at a different address one year earlier — Census CPS ASEC 2023), this is the expected count of those rows whose occupant has moved:
| Horizon | Rows expected to have moved | Date |
|---|---|---|
| 90 days | 0 | — |
| 180 days | 1 | — |
| 1 year | 1 | — |
| 5% of the file stale | 1 | April 24, 2027 |
| 10% of the file stale | 2 | December 23, 2027 |
Estimate: a constant national rate applied to every row. 5 rows sit in tracts with ≥10% vacancy, where churn runs above the national rate. Treat their clock as faster. A per-neighborhood clock (ACS B25038, year householder moved in) replaces the national rate when that table is loaded; the method line will say so. A quarterly re-run keeps the stale share under 2.0% at this rate.
| Repair | Rows |
|---|---|
| ZIP codes repaired (Excel-stripped zeros, +4 formation) | 2 |
| State names normalized to USPS two-letter codes | 2 |
| Whitespace / formatting repaired | 3 |
| Duplicate rows flagged | 3 |
| Assumption (send us yours and we re-run it) | Value |
|---|---|
| Postage per piece (metered first-class letter) | $0.73 |
| Print + materials per piece | $0.35 |
| Mailings per year | 4 |
| At-risk rows (could not standardize + blank) | 4 |
| Redundant duplicate rows | 0 |
| Waste per mailing | $4.32 |
Measured on a sample of 6 geocoded addresses from this file. 6 returned a FEMA flood zone and 5 returned an elevation. Percentages below are of the rows that returned data, not of the whole file.
| FEMA flood zone | Addresses | Share |
|---|---|---|
| Zone X | 3 | 50% |
| Zone AE | 2 | 33.3% |
| Zone D | 1 | 16.7% |
Zones A, AE, AH, AO, AR, A99, V and VE are Special Flood Hazard Areas. Flood insurance is mandatory there for a federally backed mortgage. Zone X is outside the 1% annual chance floodplain. Zone D means the area has not been studied: the risk is unknown, not low.
| Elevation across the sample | Feet above sea level |
|---|---|
| Lowest address | 7.9 |
| Median address | 21 |
| Highest address | 52.6 |
Source: FEMA National Flood Hazard Layer and the USGS 3DEP elevation service, queried at each address's geocoded coordinate.
FEMA's modelled expected annual loss for the census tracts this file sits in. 8 of 8 tracts carry values in the v1.20 (2025-12) release. Tract-level expectation in dollars, served verbatim; not a parcel or structure estimate, and not an underwriting determination.
Source: FEMA National Risk Index v1.20 (2025-12), census-tract table; freeboard from FEMA NFHL static base flood elevations and USGS 3DEP point elevations at sampled coordinates.
Method. Addresses were standardized, geocoded and deduplicated against the U.S. Census Bureau's national address inventory (Public_AR_Current benchmark), with neighborhood enrichment from the ACS 5-year survey at census-tract level. This report describes standardization quality and statistical delivery risk; it is not a postal certification and does not include change-of-address processing. Files and reports are deleted 30 days after upload. Questions go to support@revaddress.com.