# Ada Services Corporation Business profile: public business information with links to supporting state records. Data as of October 16, 2026. - Legal business name: Ada Services Corporation - Alternative and DBA names: Amca Corporation; Amca Mortgage Corporation; Assurance Mortgage Corporation; Assurance Mortgage Corporation of America; H & R Block Mortgage Corporation,; Option One Mortgage Services Inc. - Entity type: C corporation - Original incorporation date: May 21, 1991 - Time in business: 35 years and 4 months - Jurisdiction count: 47 ## All known addresses - 7595 Irvine Center Dr Ste 100, Irvine, CA 92618 (listed in Massachusetts) - 32208 PO Box, Kansas City, MO 64171 (listed in Alabama, Texas) - 3800 N Central Ave Ste 460, Phoenix, AZ 85012 (listed in Arizona) - 20 Blanchard Rd, Burlington, MA 01803 (listed in Arkansas, Maryland) - 1950 W Corporate Way, Anaheim, CA 92801 (listed in California, Tennessee, West Virginia) - 6531 Irvine Center Dr, Irvine, CA 92618 (listed in Colorado, Connecticut, Iowa, North Carolina, North Dakota, South Dakota) - 3 Burlington Woods Dr, Burlington, MA 01803 (listed in Florida, Hawaii, Idaho) - 3 Burlington, Boston, MA 02110 (listed in Georgia, Indiana, Louisiana, New Hampshire, Vermont) - 6501 Irvine Center Dr, Irvine, CA 92618 (listed in Kentucky, Ohio) - 101 State House Sta, Augusta, ME 04333 (listed in Maine) - 30600 Telegraph Rd, Franklin, MI 48025 (listed in Michigan) - 8927 Lorraine Rd Ste 204-A, Gulfport, MS 39503 (listed in Mississippi) - 8583 Irvine Center Dr Ste 25, Irvine, CA 92618 (listed in Missouri) - 7595 Irvine Center Dr Ste 120, Irvine, CA 92618 (listed in Montana) - 155 Federal St Ste 700, Boston, MA 02110 (listed in New Mexico) - 185 Technology Dr, Irvine, CA 92618 (listed in New York) - 3 Ada, Irvine, CA 92618 (listed in Oregon) - 7595 Irvine Center Dr, Irvine, CA 92618 (listed in Rhode Island) ## Registered states - [Alabama](https://index.baselayer.com/al/44cabee249826ba2): Foreign registration, as Option One Mortgage Services, Inc. - [Alaska](https://index.baselayer.com/ak/3114593477035604): Foreign registration, as Option One Mortgage Services, Inc. - [Arizona](https://index.baselayer.com/az/b39a1fadaa12e885): Foreign registration - [Arkansas](https://index.baselayer.com/ar/091816acb9113408): Foreign registration, as Option One Mortgage Services, Inc. - [California](https://index.baselayer.com/ca/bcbb8d7768758d0f): Foreign registration - [Colorado](https://index.baselayer.com/co/8b776e21ab9e9305): Foreign registration, as Option One Mortgage Services, Inc. - [Connecticut](https://index.baselayer.com/ct/b354c73d8bfa951a): Foreign registration, as Option One Mortgage Services Inc. - [Delaware](https://index.baselayer.com/de/424671c1d59a37ec): Foreign registration, as Option One Mortgage Services, Inc. - [Florida](https://index.baselayer.com/fl/34fcf1e0cf0c845f): Foreign registration, as Option One Mortgage Services, Inc. - [Georgia](https://index.baselayer.com/ga/de80f8e365f8cf95): Foreign registration, as Option One Mortgage Services, Inc. - [Hawaii](https://index.baselayer.com/hi/6e9a2d289fc72884): Foreign registration, as H&R Block Mortgage Corporation - [Idaho](https://index.baselayer.com/id/28a4d8dfe0277f2f): Foreign registration, as Option One Mortgage Services, Inc. - [Illinois](https://index.baselayer.com/il/01b98355f9fad86c): Foreign registration, as Option One Mortgage Services, Inc. - [Indiana](https://index.baselayer.com/in/3ffbdeba236843d2): Foreign registration, as Option One Mortgage Services, Inc. - [Iowa](https://index.baselayer.com/ia/96bee6206b92e453): Foreign registration, as Option One Mortgage Services, Inc. - [Iowa](https://index.baselayer.com/ia/5c7a36ce48a779f7): Foreign registration, as Option One Mortgage Services, Inc. - [Kansas](https://index.baselayer.com/ks/a30eb199d47710f9): Foreign registration, as Option One Mortgage Services, Inc. - [Kentucky](https://index.baselayer.com/ky/a16fcb339a09d74e): Foreign registration, as Assurance Mortgage Corporation of America - [Louisiana](https://index.baselayer.com/la/76d90da68a827db6): Foreign registration, as Option One Mortgage Services, Inc. - [Maine](https://index.baselayer.com/me/f5bcd88b6683816e): Foreign registration, as Option One Mortgage Services, Inc. - [Maryland](https://index.baselayer.com/md/ffa8aa17a219416c): Foreign registration, as H&R Block Mortgage Corporation - [Massachusetts](https://index.baselayer.com/ma/a049f5025619fe4a): Domestic registration - [Michigan](https://index.baselayer.com/mi/ea561026e68e1ce9): Foreign registration, as Option One Mortgage Services, Inc. - [Mississippi](https://index.baselayer.com/ms/55f9be9fc5c32818): Foreign registration, as Option One Mortgage Services, Inc. - [Missouri](https://index.baselayer.com/mo/53d389eca2c6a910): Foreign registration - [Montana](https://index.baselayer.com/mt/55e2649caf2c0b3d): Foreign registration - [Nebraska](https://index.baselayer.com/ne/93a62e251a8e81ee): Foreign registration, as Option One Mortgage Services, Inc. - [Nevada](https://index.baselayer.com/nv/d893b09109f4a02a): Foreign registration, as Option One Mortgage Services, Inc. - [New Hampshire](https://index.baselayer.com/nh/970f85fd3f36fec4): Foreign registration, as Option One Mortgage Services, Inc. - [New Mexico](https://index.baselayer.com/nm/2f04ed5133e18e61): Foreign registration - [New York](https://index.baselayer.com/ny/dada3a3a31b83265): Foreign registration - [North Carolina](https://index.baselayer.com/nc/af76b803c2378805): Foreign registration, as H&R Block Mortgage Corporation - [North Dakota](https://index.baselayer.com/nd/fd4704a59984a0bd): Foreign registration, as Option One Mortgage Services, Inc. - [Ohio](https://index.baselayer.com/oh/7dea0b99c7ab0e33): Foreign registration, as H&R Block Mortgage Corporation - [Oklahoma](https://index.baselayer.com/ok/fc97949ee3464b94): Foreign registration, as H&R Block Mortgage Corporation - [Oregon](https://index.baselayer.com/or/e4c8f163b4045072): Foreign registration, as Option One Mortgage Services, Inc. - [Pennsylvania](https://index.baselayer.com/pa/c3626786f2993f41): Foreign registration - [Rhode Island](https://index.baselayer.com/ri/c21024549b53cc85): Foreign registration - [South Carolina](https://index.baselayer.com/sc/4f0cb7a2ed3a0f2a): Foreign registration, as Option One Mortgage Services, Inc. - [South Dakota](https://index.baselayer.com/sd/5458848f3de5e0ee): Foreign registration, as Option One Mortgage Services, Inc. - [Tennessee](https://index.baselayer.com/tn/9c3758fcaccfce50): Foreign registration - [Texas](https://index.baselayer.com/tx/deff46c46b9ff391): Foreign registration - [Utah](https://index.baselayer.com/ut/31e7c199753c6aee): Foreign registration - [Vermont](https://index.baselayer.com/vt/c99c3e9bc0871f2c): Foreign registration, as Option One Mortgage Services, Inc. - [Washington](https://index.baselayer.com/wa/9e8c28d9c0a5e4cc): Foreign registration, as Option One Mortgage Services, Inc. - [West Virginia](https://index.baselayer.com/wv/70e53249a2186481): Foreign registration - [Wisconsin](https://index.baselayer.com/wi/2a01fb0d0a458cba): Foreign registration, as Option One Mortgage Services, Inc. - [Wyoming](https://index.baselayer.com/wy/1d1dfd1a5f1fd609): Foreign registration, as Option One Mortgage Services, Inc. Source: public state registration records. Missing values are not a negative finding. Cite as: Baselayer Business Index (https://index.baselayer.com/business/a049f5025619fe4a)