diff --git a/CHANGELOG.md b/CHANGELOG.md
index 420e1a9..09777f2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -90,6 +90,8 @@ replacement, and each removed path, column or flag.
   and carries the same three. `person.prefix` is null where a person has no title,
   where it used to be an empty string, so `--format sql` writes `NULL` and a `string`
   struct field reading it becomes `*string`.
+- `en_US.phone` draws its exchange, `exch`, from the central office codes NANPA can
+  assign: `200` to `999`, never `N11`, `555`, `950`, `958`, `959` or `976`.
 - `ErrNoColumns` is exported, so a caller can tell the one record fence a path can
   answer from the rest.
 - An error names a spelling that runs: a layout is named single-quoted and free of
diff --git a/data-import/tsv.py b/data-import/tsv.py
index 51ea6ea..333e9ab 100644
--- a/data-import/tsv.py
+++ b/data-import/tsv.py
@@ -5,10 +5,10 @@ from pathlib import Path
 
 
 def write(path, columns, rows):
-    """Write the rows as a TSV; the table needs two rows, and every cell must be non-empty and free of tabs, newlines and braces."""
+    """Write the rows as a TSV; the table needs two rows, and every cell is stripped, and must be non-empty and free of tabs, newlines and braces."""
     lines = ["\t".join(columns)]
     for row in rows:
-        cells = [str(row[c]) for c in columns]
+        cells = [str(row[c]).strip() for c in columns]
         if not all(cells) or any(re.search(r"[\t\n{}]", c) for c in cells):
             raise ValueError(f"{path}: a cell is empty or holds a tab, newline or brace: {row}")
         lines.append("\t".join(cells))
diff --git a/data/en_US/phone.json b/data/en_US/phone.json
index b47298b..a5e9f9e 100644
--- a/data/en_US/phone.json
+++ b/data/en_US/phone.json
@@ -3,13 +3,45 @@
     "format": "({area}) {exch}-{line}",
     "weight": 2,
     "area": ["202", "212", "213", "305", "312", "404", "415", "469", "503", "512", "602", "617", "646", "702", "718", "720", "737", "773", "786", "808", "917"],
-    "exch": "{int(100,999)}",
+    "exch": [
+      { "format": "{int(2,9)}0{digits(1)}", "weight": 80 },
+      { "format": "{int(2,9)}1{int(2,9)}", "weight": 64 },
+      { "format": "{int(2,9)}10", "weight": 8 },
+      { "format": "{int(2,4)}{int(2,9)}{digits(1)}", "weight": 240 },
+      { "format": "{int(6,8)}{int(2,9)}{digits(1)}", "weight": 240 },
+      { "format": "5{int(2,4)}{digits(1)}", "weight": 30 },
+      { "format": "5{int(6,9)}{digits(1)}", "weight": 40 },
+      { "format": "55{int(0,4)}", "weight": 5 },
+      { "format": "55{int(6,9)}", "weight": 4 },
+      { "format": "9{int(2,4)}{digits(1)}", "weight": 30 },
+      { "format": "9{int(8,9)}{digits(1)}", "weight": 20 },
+      { "format": "95{int(1,7)}", "weight": 7 },
+      { "format": "96{digits(1)}", "weight": 10 },
+      { "format": "97{int(0,5)}", "weight": 6 },
+      { "format": "97{int(7,9)}", "weight": 3 }
+    ],
     "line": "{digits(4)}"
   },
   {
     "format": "{area}-{exch}-{line}",
     "area": ["202", "212", "213", "305", "312", "404", "415", "469", "503", "512", "602", "617", "646", "702", "718", "720", "737", "773", "786", "808", "917"],
-    "exch": "{int(100,999)}",
+    "exch": [
+      { "format": "{int(2,9)}0{digits(1)}", "weight": 80 },
+      { "format": "{int(2,9)}1{int(2,9)}", "weight": 64 },
+      { "format": "{int(2,9)}10", "weight": 8 },
+      { "format": "{int(2,4)}{int(2,9)}{digits(1)}", "weight": 240 },
+      { "format": "{int(6,8)}{int(2,9)}{digits(1)}", "weight": 240 },
+      { "format": "5{int(2,4)}{digits(1)}", "weight": 30 },
+      { "format": "5{int(6,9)}{digits(1)}", "weight": 40 },
+      { "format": "55{int(0,4)}", "weight": 5 },
+      { "format": "55{int(6,9)}", "weight": 4 },
+      { "format": "9{int(2,4)}{digits(1)}", "weight": 30 },
+      { "format": "9{int(8,9)}{digits(1)}", "weight": 20 },
+      { "format": "95{int(1,7)}", "weight": 7 },
+      { "format": "96{digits(1)}", "weight": 10 },
+      { "format": "97{int(0,5)}", "weight": 6 },
+      { "format": "97{int(7,9)}", "weight": 3 }
+    ],
     "line": "{digits(4)}"
   }
 ]
diff --git a/data/misc/currency.tsv b/data/misc/currency.tsv
index 0e9f584..dacb23d 100644
--- a/data/misc/currency.tsv
+++ b/data/misc/currency.tsv
@@ -71,7 +71,7 @@ JPY	0	Yen	392	¥
 KES	2	Kenyan Shilling	404	KES
 KGS	2	Som	417	⃀
 KHR	2	Riel	116	៛
-KMF	0	Comorian Franc 	174	CF
+KMF	0	Comorian Franc	174	CF
 KPW	2	North Korean Won	408	₩
 KRW	0	Won	410	₩
 KWD	3	Kuwaiti Dinar	414	KWD
diff --git a/data/misc/territory.tsv b/data/misc/territory.tsv
index 787996d..dc760cd 100644
--- a/data/misc/territory.tsv
+++ b/data/misc/territory.tsv
@@ -48,7 +48,7 @@ CO	COL	57	Bogota	CO	COP	🇨🇴	es-CO	Colombia	170	.co
 CR	CRI	506	San Jose	CR	CRC	🇨🇷	es-CR,en	Costa Rica	188	.cr
 CU	CUB	53	Havana	CU	CUP	🇨🇺	es-CU,pap	Cuba	192	.cu
 CV	CPV	238	Praia	CV	CVE	🇨🇻	pt-CV	Cape Verde	132	.cv
-CW	CUW	599	 Willemstad	NL	XCG	🇨🇼	nl,pap	Curaçao	531	.cw
+CW	CUW	599	Willemstad	NL	XCG	🇨🇼	nl,pap	Curaçao	531	.cw
 CX	CXR	61	Flying Fish Cove	AU	AUD	🇨🇽	en,zh,ms-CX	Christmas Island	162	.cx
 CY	CYP	357	Nicosia	CY	EUR	🇨🇾	el-CY,tr-CY,en	Cyprus	196	.cy
 CZ	CZE	420	Prague	CZ	CZK	🇨🇿	cs,sk	Czechia	203	.cz