Knock Score™
A
Top 5% of U.S. ZIPs
69 / 100
17509 · Christiana, PA
Ranked #998 of 21,191 ZIPs in America
#103 of 1,089 PA ZIPs · top 10% in the state
KNOCKNOW — Know before you knock · knocknow.co/score
Knock Score™ · Door-to-door sales rating
How knockable is 17509?
Scores refresh weekly · updated 2026-11-02
Christiana’s 17509 earns a Knock Score of 69/100 (A), ranking #998 of 21,191 ZIP codes in America and #103 of 1,089 in PA (top 10% in the state). That's elite door-knocking territory — the kind of ZIP reps fight over. Standouts: 89% of homes are owner-occupied and 93% carry high equity. The Score rates the ZIP — the KnocKnow app shows the exact zones inside it where 70%+ of homes match your perfect customer.
Show your work
How the 69 was built
Owner-occupancy89% of homesbeats 95% of ZIPs × 30% weight28.4 pts
Ability to payequity · paid-off · price blendbeats 69% of ZIPs × 25% weight17.1 pts
Door density45 homes/sq mibeats 46% of ZIPs × 20% weight9.2 pts
No-HOA share99% of homesbeats 65% of ZIPs × 15% weight9.8 pts
Aging homes90% of homesbeats 47% of ZIPs × 10% weight4.7 pts
Knock Score
69 / 100 · A
Each ingredient is ranked against every scoreable ZIP in America; the grade is the curve (A− = top 10%, B+ = top 20%, …).
The breakdown
What's behind the A
Owner-occupied89%
Owners answer the door and can say yes. Renters can't buy what you're selling.
No HOA99%
Fewer gates, fewer no-soliciting boards, no HOA approval standing between a yes and an install.
High equity93%
Homes with serious equity — owners who can finance a project without blinking.
Free & clear53%
Paid-off homes. No mortgage, maximum flexibility to spend.
Built 20+ years ago90%
Homes 20+ years old need roofs, systems, and upgrades — the stuff you sell.
45homes per sq mi
$392,455median value*
1,184homes scored
*Inflation-adjusted from recent sales. Built on data covering every home in the U.S., updated regularly.
How grades work
Every ZIP in America, on one curve
Each metric is ranked against every other scoreable ZIP nationally, then weighted: owner-occupancy 30%, ability to pay 25%, door density 20%, no-HOA share 15%, aging homes 10%.
A+top 1%Atop 5%A−top 10%B+top 20%Btop 35%B−top 50%C+top 65%Ctop 78%C−top 88%Dtop 97%Fbottom 3%
ZIP-level aggregates only — no individual home data is ever shown. ZIPs with fewer than 500 scoreable single-family homes aren't scored.
See the zones inside this ZIP
The Score rates the ZIP. The app paints the exact neighborhoods inside it where 70%+ of homes match your perfect customer — before you burn a tank of gas finding out.
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