Delivery Sequence File (DSF2) Services

Delivery Sequence File (DSF2) processing updates your data by identifying known addresses and specific address attributes, and returning a walk sequence and a business/residential flag for each record that is matched. This information can be used to hone your mailing lists and produce mailings that are targeted more precisely.

Maximize address quality, minimize mailing cost. Delivery information is only as good as the quality of the address data. Our goal is to help customers send their mail to the correct address every time. DSF2 provides added product value and service offerings that enable our customers to better manage the quality of their mailing lists while maximizing the ability to deliver mail as addressed.

By using DSF2 you will qualify for postage discounts for every single mail piece when sorting by walk distance and using Delivert Point Validation (DPV) addresses.

When opting for real-time processing, the DIY Portal can process thousands of records per minute, and files are returned within hours.

It only costs $1.40 for every 1,000 input records, or $0.0014 per record. For less than a penny a record the cost for processing is easily recovered when qualifying and using the postal discounts DSF2 provides.

DSF2 only requires a mailing address. However, if your list contains name information as well we always recommend ordering NCOA^Link along with DSF2 .

The following fields and values are returned based on the Change Of Address (COA) address if a change of address match was made; otherwise they are based on the input address.

Seasonal Address Flag

Y = Seasonal Address

N = Not a Seasonal Address

Blank = No Match to DSF2 File

Vacant Address Flag

Y = Vacant Address

N = Not a Vacant Address

Blank = No Match to DSF2 File

DSF Throwback Indicator

Y = Customer With Street Address Wants Delivery at PO Box Instead
NOTE: The carrier does not deliver mail to the street or rural route/highway contract box address. The USPS may not deliver mail addressed for the street delivery point to the PO Box unless the PO Box is included in the address. DSF will not cross-reference the street address to the appropriate PO Box.

N = Not a Throwback Address

Blank = No Match to DSF2 File

DSF Record Type Indicator

B = Business Address

R = Residential Address

U = Unknown Address

Blank = Not Available

DSF Delivery Type Code

1 = Curb: A delivery with a mail receptable located at the curb.

2 = NDCBU: A delivery point that is serviced by cluster boxes, also known as Neighborhood Delivery Centralized Box Units (NCDBU).

3 = Central: A delivery within a building that has two or more ZIP + 4 codes assigned to a bank of boxes or floors.

4 = Door-slot: A delivery point serviced by something other than Curb, NCDBU, or Central blank = No Match to DSF2 File.

DSF Drop Indicator

Y = Delivery Point Serves Multiple Businesses or Families (or is a Commerical Mail Receving Agency - CMRA)

N = Delivery Point Serves Single Business or Family

Blank = No Match to DSF2 File

Delivery Point Business/Family Served Count

This field contains the number of potential deliveries to a drop site. If this address is a drop site, then this field will contain the number of businesses or families served at that drop site.

Walk Sequence Number

This unique walk sequence number for the list.

DSF Mail Score

1 = Address matched to the DSF2 file.

2 = Address marked as a seasonal address.

3 = Primary address matched, however the secondary address did not match. The address may or may not be deliverable.

4 = Address did not match the DSF2 file, but did get a ZIP + 4 match. There is a flaw in the address information that prevented a direct match to the DSF2 file. Record may be undeliverable.

5 = No match to the DSF2 database or to the ZIP + 4 database. There is a flaw in the address information that prevented a match to either the DSF2 or the ZIP + 4 database. Record may be undeliverable.

6 = Address marked as being vacant for 90 or more days. Address information is accurate but is undeliverable.

7 = Address has serious problems that prevent a match to DSF2 and ZIP + 4 files. Address fields may be incomplete, or contain junk data.

No Stat Indicator

No Stat means that the address is a vacant property, it receives mail as a part of a drop, or it does not have an established delivery yet.

Y = Address Is No Stat

N = Address Is Not No Stat

Blank = No Match to DSF2 File

Walk Sequence Source Indicator

O = Walk Sequence Is Based On Standardized Address

M = Walk Sequence Is Based On Change Of Address (COA) Address (only possible if NCOA was also run)

Educational Institution Flag

Y = Educational Institution

N = Not an Educational Institution

Blank = No Match to DSF2 File